improvised explosive devices

Veteran carries fellow Marine up Utah mountain

Marine Staff Sgt. Jonathon Blank lost his legs when an improvised explosive device detonated next to him in October 2010 in Afghanistan. But he has never let that get in the way of living a dynamic life, he tells CNN.

Bomb suspect threatened people on Twitter

On October 11, a little less than two weeks before the discovery of the first of 14 improvised explosive devices he is suspected of sending to prominent Democrats and CNN's New York offices, Cesar Sayoc tweeted at Rochelle Ritchie.