back to the west retreating. >> the ragtag rebel army is again on the move. this weekend, retaking the city ajdabiya. and heading west towards tripoli, libya's capital and colonel gadhafi's power base, the ultimate goal, regime change. >> it is u.s. policy that gadhafi needs to go, but little is known about the opposition. just who is the international coalition supporting? >> in libya, you have an unbelievably complicated mosaic and overlay of tribes and families and the rest. anyone who speaks with any confidence that we know what would succeed gadhafi, if, in fact, gadhafi were to fall or fail, i simply don't buy it. >> many of the rebel soldiers are civilians, but some of the leaders were once high-ranking members of libya's government like must staff that jalil, like the justice minister, now head of the opposition, interior