US orders its citizens out of Yemen as al-Qaeda develops exploding clothes

Remember the underwear bomber (pictured)? He's in the news again. You'll see why in a minute.

After a drone strike killed four al-Qaeda terrorists in Yemen, the United States has ordered all its citizens and all 'non-essential personnel' to leave that country immediately.

The U.S. Department of State warns U.S. citizens of the high security
threat level in Yemen due to terrorist