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A hand-made message is shown on the back of a T-shirt before the start of the Tough Mudder in Beatty, Nev. Sunday, April 14, 2013. The message reads, "No, it does not matter how slow I'm going because I'm still lapping everyone on the couch." Tough Mudder events are hardcore 10-12 mile obstacle courses designed to test all-around strength, stamina, mental grit, and camaraderie.

Steve Marcus