CNN CNN International April 4, 2015 09:13:00
Yeah. yeah. so they're very close. no sign here of an impending saudi ground force invasion. to the east in the mountains, one border guard has already been killed. and several injured in a recent houthi attack. the yemeni rebels have also threatened to invade. attack islam's two holiest sites. over here, that's dismissed as just talk. >> we will defend. we are sure that we are defending our border and we're defending mecca. they are talking. >> reporter: a few miles away at the main border crossing, it's relatively busy, almost like business as usual. until you ask the yemeni merchants crossi...