Missouri Gov. Jay Nixon, left, and Joplin Superintendent of Schools C.J. Huff, right, flank President Barack Obama as he takes the stage to deliver the Joplin High School commencement address a day ... more 
Missouri Gov. Jay Nixon, left, and Joplin Superintendent of Schools C.J. Huff, right, flank President Barack Obama as he takes the stage to deliver the Joplin High School commencement address a day before the anniversary of the twister that killed 161 people, Monday, May 21, 2012, in Joplin, Mo. Obama jetted to Joplin immediately after wrapping up the national security-focused NATO conference in Chicago, the second international summit the president hosted over the past four days. (AP Photo/The Kansas City Star, Shane Keyser) less 
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Associated Press | Photo By The Kansas City Star, Shane Keyser
Tue, May 22, 2012 2:05 PM EDT