Months ago they hawked newspapers, baled hay or studied for an algebra exam. Now these young men are among 3-million Americans stationed in England and poised on the brink of history. They're in a platoon that trains and waits while the island nation groans under a swelling stockpile of munitions and supplies. Suddenly the wait is over -- and the training, the equipment and the fighting men of Operation Overlord are put to the test. Jun