SOUTH PADRE ISLAND, Texas — A World War II ship that served for decades as a training vessel for Texas A&M University sea cadets started its final journey Friday into the Gulf of Mexico, where it'll be sunk to become an underwater habitat and diving destination. The 473-foot, 7,000-ton Texas Clipper left its dock in Brownsville, towed by a tug boat, and headed out the ship channel toward South Padre Island at mid afternoon. By nightfall, it was to be in the open waters about 17 miles offshore, then was scheduled to be sunk Saturday and become an artificial reef....