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Ryan McIntosh

Ryan McIntosh, right, takes the extra balls from Albert Montanes of Spain while working a match in the second round of play at the 2012 US Open tennis tournament, Wednesday, Aug. 29, 2012, in New York. (AP Photo/Darron Cummings)

Wounded vet works as U.S. Open ballperson

Ryan McIntosh, an Army specialist who lost his leg when he stepped on a land mine in Afghanistan

two years ago, is spending the end of his summer working for

$7.75 an hour at Flushing Meadows. His goal: Trying to be helpful and

invisible at the same time, an inspiration to people like himself but

not a distraction to those he's working for.