personnel in libya have been moved to. there are also u.s. drones flying over libya. the u.s. government says they will be used to identify militant targets. they say these are surveillance drones, not shooting drones, so any targeting information they turn up will be handed over to the libyan authorities to act on. also, not incidentally, what, there go two u.s. navy destroyers. two guided missile destroyers, the laboon and the mcfall to be positioned off the libyan coast. the primary weapons on these destroyers are tomahawk cruise missiles. this is obviously a lot of big news tonight, but our coverage of the attack on the u.s. consulate in benghazi, libya, continues, including right after this break, when we are going to be joined live from egypt by nbc's chief foreign correspondent, richard engel. please stay with us. [ female announcer ] research suggests cell health plays a key role