U.S. Coast Guard Lt. Casey Johnson participates in the 2013 Reserve Mobilization Exercise (MOBEX) on Yerba Buena in San Francisco Bay, supporting America's Cup 34 and affiliated sailing races Aug. 23, 2013. Johnson is a reservist based at Coast Guard Sector Baltimore, complementing a MOBEX crew as a liaison officer that facilitated communication with America's Cup organizers and supporting agencies during Louis Vuitton Cup races. (U.S. Coast Guard photo by Petty Officer 1st Class Rachel Polish)