The United States won't let Iran obtain a nuclear weapon, "period," but sanctions remain the best tool to keep Tehran off the nuclear path, Defense Secretary Leon Panetta said Wednesday in Israel.
Iran's senior nuclear negotiator and representatives of international powers emerged Tuesday from two days of talks on Tehran's nuclear program without having reached an agreement.
Israeli President Shimon Peres explains why 'time is running out'' in efforts to stop Iran's nuclear program.
CNN's Fareed Zakaria interviews Ahmadinejad in Tehran, Iran
Negotiators for Iran and six world powers completed the first day of discussions on Iran's nuclear program Monday in Moscow.
Professor Behzad Yaghmaian discusses the alliance between China and Russia and what it means for the rest of the world.
China's President Hu Jintao urged Iran to take a "flexible and pragmatic" approach as it enters talks on its nuclear program Friday with the U.N. nuclear watchdog in Vienna, China's foreign ministry said.
Russian President Vladimir Putin will meet with Iranian President Mahmoud Ahmadinejad in China next week before international talks are held on Iran's nuclear program in Moscow, Russia's state-run RIA-Novosti news agency reported Sunday.
North Korea proclaimed itself a "nuclear state" this week following a revision of its constitution earlier this year.
Analysis of satellite images indicate North Korea may be preparing for another nuclear test. Paula Hancocks reports.
Inspectors found a high level of enriched uranium in Iran, a U.N. report said Friday, as world powers attempt to work to stop the country from developing the capacity for nuclear weapons.
Western nations and Iran broached solutions over Tehran's controversial nuclear program Wednesday, the latest push to end the saber-rattling over the Islamic republic's atomic aspirations.
When Iranian officials arrive at the next round of nuclear talks in Baghdad on May 23, they will seek to advance several of their own goals, while only making modest changes to their nuclear program.
Russia test-fired a ballistic missile Wednesday, a move that comes amid tensions about a recent NATO announcement that it placed an interim missile defense shield in Europe.
China warns North Korea. What will the North's next nuclear test reveal? CNN's Chris Lawrence reports.
The head of the International Atomic Energy Agency says he will sign an agreement soon with Iran over its nuclear program, a sign that Iran may have agreed to broader inspections.
CNN's Jonathan Mann talks to Greg Thielmann, a senior fellow at the Arms Control Association, about Iran's nuclear plan.
Iran's talks Monday with the United Nations nuclear watchdog agency helped lay the groundwork for progress in upcoming negotiations, the Iranian regime said.
Iran's finance minister believes oil prices could rise as high as $160 a barrel thanks to sanctions over its nuclear program, a prediction that comes just as the chief of the United Nations nuclear watchdog agency headed to Tehran on Sunday for high-level talks.
The head of the United Nations nuclear watchdog agency plans to fly to Iran on Sunday to discuss nuclear issues with high-level officials in Tehran.
An Iranian delegation met with officials from the International Atomic Energy Agency in Vienna, Austria, on Monday as diplomatic wrangling continues over Tehran's controversial nuclear program.
Recent ballistic missile tests by India, Pakistan and North Korea -- which has ominously threatened to "reduce to ashes" the South Korean military "in minutes" -- are once again focusing the world's attention on the dangers of nuclear war.
Israeli Prime Minister Benjamin Netanyahu tells Erin Burnett that sanctions against Iran are delivering mixed results.
Israel's top general said Iran is led by "very rational people" and doesn't appear poised to build a nuclear bomb that would threaten his nation.
Pakistan said Wednesday that it had conducted a test launch of a medium-range ballistic missile capable of carrying a nuclear warhead, just days after its arch-rival India tested a longer-range missile.
Pakistan says it has test-fired a missile capable of carrying a nuclear warhead. CNN's Reza Sayah reports.
As talks over Iran's nuclear program are set to resume Isarelis express scepticism about deal being brokered.
President Obama has firmly rejected a complaint by Israeli Prime Minister Benjamin Netanyahu that Iran was given a "freebie" on its nuclear program.
Nuclear talks will resume in May between Iran and the P5-plus-1 group of countries.
Israel on Sunday slammed a decision by key world powers to place no new restrictions on Iran before the next meeting about its nuclear program in late May.
CNN's John Vause talks to The Ploughshares Fund president Joseph Cirincione about North Korea's failed rocket launch.
After months of tension and frustration, key world powers and Iran sounded more optimistic Saturday after "constructive and useful" talks about Tehran's intentions for its nuclear program.
Once again, North Korea has violated an important international agreement by launching a long-range missile. And like many times before, there is not much Washington or anyone else can do about it.
With talks over Iran's nuclear program looming, the negotiating platforms are emerging. CNN's Barbara Starr reports.
Iranian nuclear negotiators arrived Friday and began consultations with Chinese and Russian counterparts on the eve of international talks on the country's nuclear program, state media reported.
It was meant to be a show-stopping display of military might, a rocket poised to enter orbit to celebrate 100 years since the birth of the man who founded North Korea.
Paula Hancocks reports on what the possible fallout could be for South Korea after North Korea's failed rocket launch.
Iran said Wednesday it plans to present new proposals at upcoming talks on its controversial nuclear program.
President Obama addresses Iran's nuclear program ahead of the nuclear summit in Seoul, South Korea.
Nuclear talks will resume this week in Turkey between Iran and six world powers, the European Union reported Monday.
North Korea is planning a new nuclear test in the area where it staged previous atomic blasts, according to a report from South Korean intelligence officials obtained by CNN.
Stalled talks between Iran and world leaders over its nuclear ambitions will resume April 13 at a yet-undetermined venue, the country's state-run media reported Wednesday.
World leaders are meeting in Seoul this week to discuss how to deal with the threat of nuclear terrorism.
North Korea has more uranium enrichment facilities than it has admitted to previously, a U.S. scientist charged Thursday.
China says it has had "a frank, in-depth talk" with North Korea about the situation on the Korean Peninsula after Pyongyang's announcement of a planned satellite launch provoked an international outcry.
North Korea has invited the International Atomic Energy Agency to return, nearly three years after it kicked U.N. nuclear inspectors out of the country, the IAEA said Monday.
Iran's controversial nuclear program began more than 50 years ago with aid from the West. Now, despite Iran's assurances that its program is purely peaceful, some Western countries, the United Nations and the International Atomic Energy Agency say they're concerned that Iran wants to use the program to create a nuclear weapon. Here's a look at Iran's nuclear program over the years:
Many are sounding the alarm about Iran going nuclear. CNN's Reza Sayah reports on what's behind the rhetoric.
Iran says it wants more clarity from the IAEA before it allows inspectors into the Parchin military complex south of Tehran, one of Iran's most influential officials said Wednesday.
North Korea's agreement to halt portions of its nuclear and missile programs and accept the return of nuclear inspectors is a "modest step in the right direction," U.S. Secretary of State Hillary Clinton said Friday.
U.S. food aid is going to North Korea for the first time in three years. CNN's Eunice Yoon reports.
Why is the international community suspicious of Iran's nuclear program? CNN's Hala Gorani reports.
A threatened Israeli attack on Iran's nuclear program carries enormous risks for the Jewish state, including international isolation, retaliation at home and abroad, and steep economic costs.
Faced with mounting pressure from world powers over its controversial nuclear program, Iran's ambassador to the International Atomic Energy Agency reiterated Thursday that his country "is ready to re-engage with (the) IAEA."
In a CNN exclusive, IAEA Director General Yukiya Amano shares his suspicions with CNN's Matthew Chance.
It's been almost a decade since the United States accused Iran of actively working on a secret program to develop nuclear weapons. Since then, Iran has steadfastly proclaimed to a skeptical world that it only seeks to produce nuclear energy, while American presidents have repeatedly warned that the United States will not tolerate a nuclear-armed Iran. Over the years, the international community has demanded, to no avail, that Tehran end its uranium enrichment program.
There are "red lines," a "window of opportunity," the risk of a "zone of immunity," and plenty of other cryptic terms about Iran's nuclear program. What does it involve? Where is it leading? How and when should it be stopped or restrained?
Iran is not open about its nuclear program, but it should be, the head of the U.N. nuclear watchdog agency said Wednesday.
CNN's Matthew Chance reports U.N. inspectors have "credible information" that Iran may be developing a nuclear device.
The United States and other countries agreed Tuesday to resume negotiations with Iran over its nuclear program.
What is at stake in the meeting between the leaders of the United States and Israel?
CNN's Becky Anderson talks to Christiane Amanpour about the Iranian elections and their rising tensions with Israel.
Israeli Prime Minister Benjamin Netanyahu tells the AIPAC conference that Iran must never be allowed a nuclear weapon.
President Barack Obama and Israeli Prime Minister Benjamin Netanyahu said Monday they stand together in their efforts to prevent Iran from obtaining a nuclear weapon, but Netanyahu warned that time for diplomacy was running short.
Evidence of ongoing activities at an Iranian military base suspected of being involved in testing related to nuclear weapons makes inspectors eager to get there as soon as possible, the head of the International Atomic Energy Agency said Monday.
While speaking at the AIPAC conference, President Obama says he has kept his commitments to Israel.
Preventing Iran from developing a nuclear weapon is a national security interest of both Israel and the United States, President Barack Obama said Sunday in calling for continued diplomatic efforts but also pledging that all options -- including a military effort -- remain viable.
Pres. Obama prepares for a big meeting with Israeli Prime Minister Netanyahu. CNN's Jessica Yellin reports.
President Barack Obama says he isn't bluffing when he says Iran shouldn't have a nuclear weapon, but he cautions against an Israeli strike against the Islamic republic.
Never a regime to do something for nothing, North Korea took what Secretary of State Hillary Clinton called a "modest first step" in agreeing to halt its nuclear and missile program in exchange for food aid.
In return for food aid from the United States, North Korea has agreed to stop nuclear activity at its main facility in Yongbyon, both countries said Wednesday.
North Korea has agreed to stop nuclear testing and allow inspectors back into the country in exchange for food aid.
Oil prices surged on Friday as the UN's nuclear watchdog said Iran had significantly increased its production of higher-grade uranium over the past six months and had failed to dispel concerns that it was pursuing atomic weapons.
CNN's Erin Burnett speaks to Ali Asghar Soltanieh, an Iranian nuclear scientist about Iran's expanding nuclear activity.
Iran has stepped up efforts to produce enriched uranium in violation of international resolutions to stop, the International Atomic Energy Agency said Friday in a report posted online by a nonproliferation group.
Two days of talks in Iran went nowhere and the frustration of the global nuclear watchdog agency was palpable in the terse statement it issued afterward.
Fareed Zakaria gives his take on how much of a threat Iran poses the world.
A look at the ongoing power play over the Strait of Hormuz and deterring the threat from Iran.
Two days of talks with Iran have failed to produce agreement on how to verify that Iran's nuclear program remains peaceful, the International Atomic Energy Agency announced Tuesday.
Tension around Iran--and the actions of the Iranian leaders--could lead to five dollar a gallon gas in the U.S. by summer.
Iran warned Tuesday it would strike against an "enemy" threatening it if needed to protect its national interests -- even if the enemy didn't attack first.
CNN's Matthew Chance reports on IAEA officials beginning a second round of talks with Iran over its nuclear program.
Officials with the U.N. nuclear watchdog agency begin a second round of talks Monday with Iranian officials over the country's nuclear program, a day after Tehran cut off crude exports to British and French companies in retaliation for a new round of sanctions imposed on the regime.
Iran is offering to resume talks over its nuclear program as soon as possible. One expert calls it a "stall" tactic.
Is Iran any closer to being able to build a nuclear bomb? CNN's Jim Clancy takes a closer look at the nuclear program.
Western nations welcomed Friday a letter from Iran offering a resumption of stalled nuclear talks, though they were still determining the Islamic republic's sincerity.
Iran is offering to resume talks over the country's nuclear program as soon as possible, according to a letter that the nation's nuclear negotiator sent to the European Union.
There is nothing new about the tension between the United States and Iran. Relations have swung from crisis to crisis ever since the fall of the Shah in 1979. But recently, this tension is turning into outright confrontation and the threat of war.
The supreme leader of Iran issued a blunt warning Friday that war would be detrimental to the United States -- and that Iran is ready to help anyone who confronts "cancerous" Israel.
The United Nations nuclear monitors plan to return to Iran at the end of the month after a positive assessment from both sides of the latest visit.
Top International Atomic Energy Agency officials arrived in Iran Sunday, state media reported, after the head of the United Nations nuclear watchdog expressed fresh concerns that the Islamic republic was trying to develop nuclear weapons.
Iran's envoy to the International Atomic Energy Agency said Friday he is hopeful that the recent planned visit by representatives of the nuclear watchdog will "resolve any ambiguity and show (our) transparency and cooperation with the agency."
Iran has issued an impassioned letter to the United Nations Secretary General charging that the killings of Iranian nuclear scientists were terror attacks that followed a clear pattern -- an assertion the country's ambassador to the United Nations repeated to CNN in an interview Wednesday night.
A nuclear scientist was killed in a blast in Tehran on Wednesday morning, an Iranian news agency reported, in the latest in a string of attacks that Iran has blamed on Israel.
Iranian President Ahmadinejad said in an address on state TV, "Why don't you do a report about the US nuclear program?"
The United Nations' nuclear watchdog agency confirmed Monday that uranium enrichment has begun at a nuclear facility in northern Iran.
Iran's Bushehr nuclear power plant is just weeks from operating at full capacity, the country's top nuclear official said Saturday.