THIS IS A RUSH TRANSCRIPT.  THIS COPY MAY NOT BE IN ITS FINAL FORM AND MAY BE UPDATED. PAULA ZAHN, CNN ANCHOR: America's allies in Afghanistan have been able to rout the Taliban without few major battles, but now what could be a final bloody battle is under way against al Qaeda fighters trapped in Tora Bora. Those al Qaeda fighters, possibly led by Osama bin Laden, are dug in deep in a rugged piece of mountainous real estate. Our Brent Sadler has the very latest on the relentless air assault and uphill ground attack. Brent, what's the latest from there at this hour?</s>BRENT SADLER, CNN CORRESPONDENT: Thanks, Paula -- good morning. Well, hunt-and-kill operations against the al Qaeda network in the Tora Bora mountain range were certainly stepped up this day. There's a lull right now, but for many, many hours from just after daybreak -- we can show you the video now -- wave upon wave of U.S. bombers have been pounding a very small concentrated area in the mountain range in eastern Afghanistan here. Bomb after bomb hitting areas, single bombs, multiple bombs, shaking the valleys, waking everybody up here and really, really putting the entire media quarters watching this event on absolute</s>ZAHN: Brent Sadler -- thanks so much.
Bloody Battle Begins Against Dug-In Al Qaeda Fighters