WASHINGTON — SEPTEMBER 16: U.S. President Barack Obama jokingly attacks Olympic fencer Tim Morehouse during a fencing demonstration on the South Lawn of the White House promoting the city of Chicago?s bid for the 2016 Summer Olympics September 16, 2009 in Washington, DC. Obama joined Chicago Mayor Richard Daley, members of the USOC, and representatives from the Chicago2016 group during the event. (Photo by Win McNamee/Getty Images)