GWT: APTN footage of shock and awe bombardment

1. Explosion over Baghdad skyline 2. Massive cloud of smoke from explosion 3. Explosion lights up skyline 4. Presidential palace on fire, black smoke pouring out 5. Explosion lights up skyline 6. Presidential palace on fire, black smoke pouring out 7. Various plumes of smoke over skyline STORYLINE: A barrage of explosives crashed down on Baghdad on Friday, sending enormous fireballs and clouds of smoke billowing high into the night sky above the Iraqi capital. The heavy attack started at 9 p.