It's a loss of aircraft worth more than $200 million in what is becoming the most dramatic cost to the Pentagon of the military campaign against the group.
Sgt. Jose Duenez, Sgt. Edvin Franco and Pfc. Dante Taitano were recovered Monday from a peat bog. The fourth soldier's identity has not yet been released.
By Beth Sullivan and Lolita C. Baldor, The Associated Press