CNN CNN Newsroom December 27, 2013 15:48:00
Plotting attacks both within yemen and u.s. and other western structures as well as overseas. >> the group in yemen already well known for the failed underwear bomber attempt to bring down an airplane christmas day 2009. four years later the intelligence community believes it poses the greatest threat of an attack on the u.s. >> they're still capable of posing attacks against yemen and the united states in multiple locations including trying to conduct attacks against the u.s. homeland especially by taking down aircraft. >> reporter: analysts say the group rebounded in 2013 from battle field l...