Navy divers from Mobile Diving and Salvage Unit (MDSU) 2 in Little Creek, Va., along with Army, Navy Reserve and Coast Guard divers began a monumental training exercise off the coast of Fort Lauderdale on June 3. During the monthlong “DiveExEast 07,†military and Coast Guard divers will determine the most effective method for recovering an estimated 600,000 to 700,000 used tires off the ocean floor. It’s estimated that nearly 2 million tires were placed into the ocean in the 1970’s by private organizations hoping to create an artificial reef. Over the years, the successful formation of an artificial reef did not occur; the tires loosened and moved, damaging the nearby natural coral reefs.