It had rained the night before, and the air was clear and fresh, the smell of winter on the wind, as President Clinton&#039s motorcade wound among the gleaming white headstones of Arlington National Cemetery. The president&#039s destination was an empty patch of earth. It had been chosen as the site of a memorial to the 270 persons who five years earlier to the day had died in the bombing of Pan Am Flight 103 over Lockerbie, Scotland. Full Story