Coast Guard Petty Officer 1st Class Christopher Hartman, from Maritime Safety and Security Team San Francisco, and his dog Evy conduct training in AT&T Park in San Francisco Thursday, March 27, 2014. Explosive detection dogs, like Evy, conduct annual training aimed at measuring the dogs' ability to detect bomb-making materials. U.S. Coast Guard photo by Petty Officer 3rd Class Adam Stanton
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