Coast Guard Petty Officer 1st Class Billy Porter, a maritime enforcement specialist and K-9 handler assigned to Coast Guard Maritime Safety and Security Team Seattle, prepares his partner, Crema, for a maritime response exercise held in Astoria, Ore., May 21, 2014. The Coast Guard participated in a multiagency response exercise for a potential threat on a vessel on the Columbia River. (U.S. Coast Guard photo by Petty Officer 1st Class David Mosley)