Petty Officer 1st Class Billy Porter, a K-9 handler from Coast Guard Maritime Safety and Security Team Seattle, and his partner, Crema, conduct a search of the motor vessel Ironwood during a maritime response exercise on the Columbia River May 21, 2014. The multi-agency exercise tested the readiness of the participants' ability to handle various potential threats. (Official Coast Guard photo by Petty Officer 1st Class Zac Crawford)