Mystery man on roof: An image of the second explosion also captures a shadowy figure on a roof above the incident. Who is the mystery man on the roof? Consipiracy theorists want to know.
Worst company in America: Why is Electronic Arts in the Final Four for "worst company in America?"
Bill O'Reilly: Gay marriage proponent? Bill O'Reilly said on Tuesday that the arguments against gay marriage were weak. But does that mean he's a gay marriage supporter?
Russian tycoon found dead: Boris Berezovsky was found in his Surrey, England, home, dead. Cause of death is not known yet. But there is speculation that the once-wealthy Russian tycoon committed suicide.
A Swiss couple bicycling in India were attacked and the woman was gang raped, say police. The alleged attack again raises the profile of sexual violence against women in India.
As the Papal conclave gets underway in Rome, the Twittersphere is lighting up with final farewells from some of the 115 cardinals, as well as comedians.
Sulaiman Abu Ghaith, the son-in-law of Osama Bin Laden and Al Qaeda spokesman, now faces a trial in New York. But some Republicans want Abu Ghaith to face a military trial in Guantanamo. Why?
If you're reading this, you're probably interested in aviation or at least riding a commercial aircraft safely from Point A to Point B. Airplane accidents tend to get hyped in the media, generating more anxiety about flying than the facts warrant. Is it safest to fly in the front or back of an airliner? Are some airlines safer than others? Take this quiz to test your knowledge of aviation safety.