Obama jokes about aging during 2nd term - Article Photos 2/10

Late-night television host and comedian Conan O'Brien gives a 'thumbs-up' as he tours the Brady Press Briefing room of the White House in Washington, Friday, April, 26, 2013. O'Brien visited the White House ahead of his schedule hosting of the annual White House Correspondents Dinner on Saturday. (AP Photo/Pablo Martinez Monsivais)