When James Huberty walked into a McDonald's restaurant 25 years ago this month, he knew he was going to kill somebody. He probably didn't know his murderous rampage would change how police departments work. At 3:40 p.m. on July 18, 1984, Huberty carried a long-barreled Uzi semiautomatic rifle, a pump-action shotgun and a handgun into a McDonald's in San Ysidro, an enclave of San Diego, California.Witnesses...