Tony Ding Photography

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A Marine Corps officer braces himself against the wind generated by Marine One, left, as it prepares to take off with President Barack Obama onboard for Ann Arbor, Mich., at Detroit Metropolitan Airport, Saturday, May 1, 2010, in Romulus, Mich. President Obama is heading to give the commencement address at the University of Michigan's football stadium. (AP Photo/Tony Ding)