PHILADELPHIA - APRIL 29: A race official holds a starter's pistol in the air waiting to start a hurdles race at the 117th Penn Relays April 29, 2011 in Philadelphia

PHILADELPHIA - APRIL 29: A race official holds a starter's pistol in the air waiting to start a hurdles race at the 117th Penn Relays April 29, 2011 in Philadelphia

 Stock photo ID: 77242324

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Editorial credit: Aspen Photo / Shutterstock, Inc.

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