Susan Rice

Our bottom line, if you want to call it a red line, president's bottom line has been that Iran will not acquire a nuclear weapon and we will take no option off the table to ensure that it does not acquire a nuclear weapon, including the military option.

When people said Africa would change me, I didn't understand what they meant. To see the poverty in the townships, for instance, is overwhelming. I found it heart-wrenching to see young children walking barefoot and hungry in the dirt. I'm the kind of person who wants to change the world right here and now, so I got frustrated.

The families of many athletes - incensed at the sports leagues and hoping to make games safer overall - are increasingly making the brains of players who die prematurely and suspiciously available for study. Some athletes are even making the bequest themselves.