Boston, MA - A frantic race against the clock is underway as authorities intensify their efforts to locate a missing submarine specially designed for exploring the depths of the Titanic wreck. The search is concentrated on an area approximately 900 miles off the coast of Cape Cod, Massachusetts, where recent underwater noises were detected by Canadian aircraft. With the clock ticking, rescue teams fear for the safety of the five individuals aboard the 21-foot deep-sea vessel, which lost contact just one hour and 45 minutes after submerging on Sunday morning. With a limited oxygen supply of 96 hours, the. . .