Petty Officer 2nd Class David Tourmo, a maritime enforcement specialist at Coast Guard Sector Detroit, along with Canadian law enforcement officers, prepares for a Shiprider 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)