BOSTON - Coast Guard boarding team members from the Coast Guard Cutter Flyingfish and Coast Guard Sector Boston approach a 600-foot tanker vessel less than two miles south of Nahant, Mass., Oct 21, 2007 for boarding to ensure there are no security concerns with the crew or vessel prior to entering the Port of Boston, and that it has the proper safety equipment onboard. Sector Boston conducted a four-day maritime domain awareness exercise this week that aimed to enhance homeland security operations in the vicinity of the Port of Boston. (Coast Guard photo/PA3 Connie Terrell)