A spectator on the National Mall holds an image of President Obama and Martin Luther King during the 2013 presidential inauguration in January. Gabriel B. Tait/MCT/Landov hide caption

itoggle caption Gabriel B. Tait/MCT/Landov

President Obama makes an unannounced stop to talk with the Tully Central High School soccer team about their plans for college in Tully, N.Y., on Friday. Jacquelyn Martin/AP hide caption

itoggle caption Jacquelyn Martin/AP

President Obama steps off his bus, nicknamed "Ground Force One," as he arrives for breakfast at the Ossorio Bakery and Cafe in Cocoa, Fla., during a two-day bus tour last year. Saul Loeb/AFP/Getty Images hide caption

itoggle caption Saul Loeb/AFP/Getty Images