>> reporter: alex according to officials, the situation for those u.s. special operations forces has just become too hot, too much of a risk. the threat is too high according to sources, so why take that risk? let's pull them out now. that includes 100 special operations forces u.s. commandos including green berets and navy s.e.a.l.s. the green berets have been training yemeni military forces in counterterrorism operations. but the americans themselves have not been involved in direct ground combat operations against the militants there. there were only the two situations where u.s. navy s.e.a.l.s made two separate attempts in november and december of last year to rescue american journalist luke somers. but lo and behold in the second attempt, somers was killed by al