FILE - In this Sept. 8, 2010, file photo, first lady Michelle Obama runs a 40-yard sprint during the Let's Move! Campaign and the NFL's Play 60 Campaign festivities with area youth, to promote exercise and fight childhood obesity, in New Orleans. Recent changes put in place by the food industry are in response to the campaign against childhood obesity that Obama began waging three years ago. (AP Photo/Gerald Herbert, file)

Associated Press
FILE - In this Sept. 8, 2010, file photo, first lady Michelle Obama runs a 40-yard sprint during the Let's Move! Campaign and the NFL's Play 60 Campaign festivities with area youth, to promote exercise and fight childhood obesity, in New Orleans. Recent changes put in place by the food industry are in response to the campaign against childhood obesity that Obama began waging three years ago. (AP Photo/Gerald Herbert, file)
FILE - In this Sept. 8, 2010, file photo, first lady Michelle Obama runs a 40-yard sprint during the Let's Move! Campaign and the NFL's Play 60 Campaign festivities with area youth, to promote exercise and fight childhood obesity, in New Orleans. Recent changes put in place by the food industry are in response to the campaign against childhood obesity that Obama began waging three years ago. (AP Photo/Gerald Herbert, file)
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