Bill Gates is no longer the world's richest person; Mexican billionaire Carlos Slim now has that title. Find out how who Mr. Slim is, and how he made his billions. Also: we hear about an AP photographer who's being detained in an US Army prison in Iraq without charges. Then a look at the toll the Iraq war has taken on soldiers, both on the frontlines and here at home. Plus, the manuscripts of two former slaves who wrote about their escapes to freedom.

We want your favorite holiday cookie recipe! On Dec. 11, we're hosting a Christmas cookie recipe swap. Dig up your favorite recipe and submit here.