At Andersonstown Road in the heart of a Catholic section, the cortege stopped, and Irish Republican Army men fired into the air three volleys of honor and mourning. The remains of terrorist and hunger striker Robert (Bobby) Sands, 27, were little more than a husk after a 66-day prison fast. He had failed to force the British government to grant political status to imprisoned I.R.A. members. But he had managed to fan passions-and street violence-to levels unseen in the North in nearly a decade.