BAGHDAD, Iraq - A barrage of mighty explosives crashed down Friday on Baghdad, sending enormous fireballs and clouds of smoke billowing high into the night sky above the Iraqi capital. Some two hours later, the distinct sound of aircraft could be heard over Baghdad for the first time since the start of the U.S.-led attack on Iraq (news - web sites). A huge fire raged to the south of the city; the red glow of the flames illuminated the horizon. The presidential compound at the Old Palace was struck anew by missiles after a lull in the heaviest attack on...