Write a Briefing Note for the Chief of Police in Hill Valley to provide situation awareness of a fictitious incident described in the following witness statement: NAME_1 didn't understand but he did know that, to date, few Libyans he had heard of had been involved had been involved in anything but dark and dangerous business. The effect was of someone yelling "Fire!" in a crowded theater. NAME_1 believed and acknowledged that there was trouble without further investigation. Hurling his body to one side, he looked for the nearest solid object that would provide cover. The only two choices were the step-van and the DeLorean. / NAME_2 was already heading for the step-van. / "Run for it, NAME_1!" he shouted. "I'll draw their fire!" / Simultaneously, he hustled into the truck and appeared a moment later with a revolver. By this time, the side door of the black van had slid open and a swarthy character resembling NAME_3 leaned out. He threw up an AK-47 submachine gun and opened fire.