The Big Guns

[Washington, D.C., April 21. Image via Getty]

WASHINGTON - APRIL 21: U.S. first lady Michelle Obama flexes her muscles as she exercises with schoolchildren at the River Terrace School April 21, 2010 in Washington, DC. Mrs. Obama visited the school to highlight physical activity as a critical element of the 'Let�s Move!' initiative with several Olympians and Paralympians, including 2010 Olympians Shani Davis and Hannah Kearney and 2010 Paralympians Alana Nichols and Heath Calhoun. (Photo by Win McNamee/Getty Images)