U.S. Army Corps of Engineers personnel, under instruction from Coast Guard personnel form the 13th District and Sector Puget Sound, deploy oil spill containment boom from Corps’ Marine Vessel Puget during a boom deployment exercise near the Chittenden Locks in Seattle, May 11, 2016. The exercise simulated a large oil spill threatening wildlife, aquatic species, shoreline habitat and nearby infrastructure. U.S. Coast Guard photo by Petty Officer 1st Class George Degener.