"Who was Amanda Knox? Was she a fresh-faced honor student from Seattle who met anyone's definition of..." — Tina Brown

The rights of women are to the 21st century what civil rights were to the 20th.

Obama's stern demeanor punctuated by intermittent flashes of his wide, relaxing smile is his greatest weapon in defusing pent-up angst.

Being president, you may have more power than anyone else in the country, but you quickly discover that you have much, much less than you thought you'd have going in. You're hamstrung in ways you never dreamed of.

The viral power of online media has proven how fast creative ideas can be spread and adopted, using tools like cellphones, digital cameras, micro-credit, mobile banking, Facebook, and Twitter. A perfect example? The way the Green Movement in Iran caught fire thanks to social media.