Petty Officer 2nd Class David Tourmo, a maritime enforcement specialist at Coast Guard Sector Detroit, talks on a hand-held radio during a Shiprider boarding demonstration on the Detroit River near downtown Detroit, April 30, 2015. Shiprider is a program that enables specially-trained officials, from both Canada and the United States, to pursue or interdict suspected criminals transiting across the shared maritime border. (U.S. Coast Guard photo by Petty Officer 2nd Class Levi Read)