Petty Officer 2nd Class Cory Sumner, a San Francisco Maritime Enforcement Specialist, directs Blasjo, an explosive detection K-9, during a search of AT&T Park Thursday, March 27, 2014. The goal of the exercise is to get the explosive detection K-9s, like Blasjo, prepared to do sweeps in preparation of the baseball season. U.S. Coast Guard photo by Petty Officer 3rd Class Adam Stanton