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Obama Joplin
Missouri Gov. Jay Nixon, left, President Barack Obama and Joplin School District Superintendent C.J. Huff, right, pause for a moment of silence during the Joplin High School commencement, 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)
Credit: AP