blood on their hands are fighting in libya -- >> reporter: the deputy secretary of state responded by simply saying that it is a policy of the u.s. to defend the libyan people. and wolf, as for the defense secretary he revealed for the first time he's personally opposed to arming the rebels, even though that is a policy the administration is active discussion, and gates set no ground troops, quote, as long as i'm in this job. >> he was adamant about that. the longer this goes on, the questioning will intensify, i am sure. thanks, dana. rebel forces in libya on the defensive as gadhafi loyalists close in. do they need more help from the coalition? short answer -- absolutely. just ahead an opposition leader speaking exclusively with cnn. you'll hear what he has to say. plus an american arrested in syria. while some are calling him a scapegoat.