the crowd. i spoke to the u.s. ambassador this morning, who declined a comment, saying this is being handled out of washington, but a european ambassador said this is a direct response to the attacks we saw in benghazi, libya, september 11th, 2012. the u.s. is not taking any chances. the arrests we saw here and then the jail-breaks taking place by al qaeda over the last two months leading to that interpol alert also raising concerns here. perhaps it's an overreaction, but the attitude right now, it's better safe than sorry. we had one of our producers in the area today at the u.s. embassy, and there's only a few marines protecting the facility, nobody else. let's go to dan rivers in london. >> reporter: thanks, john. yeah, here in london, while the u.s. is closed 22 embassies across much of north africa and the middle east and into asia, here, the uk has decided a more targeted approach. they've just closed down the british embassy in yemen. they have issued some urgent travel advice, telling all