<p>Task Force 121, the secret manhunting unit formed for the war on terrorism, is a blend of warriors, aviators, CIA officers and deep-cover intelligence collectors who nabbed Saddam Hussein and now hope to grab Osama bin Laden.</p>
<p>"This is tightening the sensor-to-shooter loop," said a senior defense official. "You have your own intelligence right with the guys who do the shooting and grabbing. All the information under one roof."</p>