As the Campaign to Abolish Nuclear Weapons receives Nobel Peace Prize, author Greg Mitchell reviews a new book reflecting on the history of nuclear weapons and the growing threat posed by them today.

Nuclear war, absent an immediate, fundamental, worldwide change in attitude, could be weeks, months or years away.

As drug costs increase, are advertising agencies influencing the research behind your medication? And at one Mississippi high school, a former civil rights activist is using math to change his students' lives.