Coast Guard Ensign Donald Rudinckas, a shipboard damage control instructor, teaches a group of Exercise Tradewinds 2012 participants the best method to plug holes to stem incoming water, June 19, 2012. Tradewinds is a multinational, interagency exercise designed to develop and sustain relationships that improve the capacity of U.S., Canadian and 15 Caribbean partner nations security forces to counter transnational crime and provide humanitarian assistance and disaster relief.