In an unprecedented double firing, Defense Secretary Robert Gates asked for the resignation of two top Air Force officials. Gates cited the mistaken shipment of missile parts to Taiwan and a declining nuclear mission focus in announcing the removal of Chief of Staff Gen. Michael Moseley and civilian secretary Michael Wynne. Noah Shachtman, editor of Wired's National Security Blog "Danger Room," explains the significance.

Horse racing is now a $15 billion industry, according to New York Times sportswriter Joe Drape. Joe spoke with The Takeaway about how racing has changed since the days of Seabiscuit, the prospects for Big Brown in this weekend's race, and the incredible popularity of the Times' racing blog, The Rail.

A new exhibit at New York City's PS1 art gallery is created from the camera-phone photos of visitors. Other artists are painting on buildings overlooking the Thames. The Takeaway's culture critic, Mary Beth Williams, talks about the disappearing lines between artist, art and audience.