The ADSB safety system has become a flashpoint as some have pointed to its likely lack of use by the helicopter as a potential cause of the Jan. 29 crash.
Thousands stood in respect on Vilnius' streets as hearses carried the bodies of the four soldiers to the airport before being flown to the U.S. for burial.
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