** FILE ** Comedian Conan O'Brien speaks at the John F. Kennedy Presidential Library in Boston, May 24, 2012. O'Brien will be spending a late night with President Obama at the White House Correspondents' dinner on April 27. (Associated Press)
** FILE ** Comedian Conan O'Brien speaks at the John F. Kennedy Presidential Library in Boston, May 24, 2012. O'Brien will be spending a late night with President Obama at the White House Correspondents' dinner on April 27. (Associated Press)
**FILE** Comedian Conan O'Brien speaks May 24, 2012, at the John F. Kennedy Presidential Library in Boston. (Associated Press)
**FILE** Comedian Conan O'Brien speaks May 24, 2012, at the John F. Kennedy Presidential Library in Boston. (Associated Press)
Massachusetts Democratic candidate for the U.S. Senate Elizabeth Warren talks during a forum at the John F. Kennedy Presidential Library and Museum in Boston, Tuesday, July 17, 2012. The forum was originally intended to be a debate between Warren and incumbent Sen. Scott Brown, R-Mass., before Brown backed out. (AP Photo/Stephan Savoia)
Massachusetts Democratic candidate for the U.S. Senate Elizabeth Warren talks during a forum at the John F. Kennedy Presidential Library and Museum in Boston, Tuesday, July 17, 2012. The forum was originally intended to be a debate between Warren and incumbent Sen. Scott Brown, R-Mass., before Brown backed out. (AP Photo/Stephan Savoia)
Conan O'Brien discusses his life and the art of comedy during a forum at the John F. Kennedy Presidential Library in Boston, Thursday, May 24, 2012. (AP Photo/Michael Dwyer)
Conan O'Brien discusses his life and the art of comedy during a forum at the John F. Kennedy Presidential Library in Boston, Thursday, May 24, 2012. (AP Photo/Michael Dwyer)
