I spoke at TED in 2006, the year they started to put the talks online. I'm told that since then, the talk has been downloaded more than 3.5 million times in more than 200 countries. The number of people who've seen it may be 20 times that or more.
The oldest of my three children started college this year, prompting me to flash forward to the day when my kids have all left home and the expenses of child rearing - from piano lessons to orthodontics, summer camp to undergrad tuition - are firmly behind me.
The sheared-off building, twisted metal, and high body count aren't the only familiar characteristics here. When terrorism experts see the carnage in Taba, Egypt, the immediate pattern of attack is telltale: simultaneous bombings, maximum casualties and a broader intent.
In the United States, the terrorism threat level has been raised to code orange, or high, for potential targets in the financial services sector of New York City, northern New Jersey and Washington, D.C.
Blackwater Security Consulting -- whose four employees were viciously killed and their corpses mutilated by a mob in Fallujah, Iraq -- is one of a growing number of private security contractors that are hiring veterans for jobs previously assigned to the military.
Pakistani forces have surrounded a man they believe is Ayman al-Zawahiri, al Qaeda's No. 2 leader, Pakistani government sources said. More than 200 al Qaeda fighters are trying to prevent his capture, the sources said.