we are following breaking news. new u.s. weaponry now being cleared for use against moammar gadhafi's forces. defense secretary robert gates says president obama has signed off on the use of predator drone aircraft in libya. cnn pentagon correspondent barbara starr is working. this story for us. barbara, what can you tell us about how these predator drones will be used? >> well, candy, these -- this was just approved in the last several days by president obama when nato made the request of the united states for these unmanned drones which nonetheless are armed with missiles. they will now fly against gadhafi's military targets. they will fly against air defenses and troop formations on the ground of gadhafi units. heavy armor. they will fly against a number of facilities trying to target them. trying to help protect libyan civilians because as we have