SAULT STE. MARIE, Mich. - Representatives from various federal, state and local and Canadian agencies, tribes, and stakeholders listen as Coast Guard Capt. Joseph McGuiness, commander of U.S. Coast Guard Sector Sault Ste. Marie, Mich., provides a briefing before beginning a full-scale maritime security exercise in the St. Marys River in Sault Ste. Marie Sept. 15, 2011. The exercise, planned around a scenario of a bomb placed on the Soo Locks, was designed to strengthen partnerships among all those involved and followed an oil-spill exercise the previous day. (U.S. Coast Guard photo by Petty Officer 2nd Class Lauren Jorgensen)