Air Disasters
The plane was carrying dozens of Red Army Choir singers and dancers to Syria to entertain Russian troops.
The crash killed 71 people last month, including most of Brazil's Chapecoense soccer team.
Officials have said pilot error or a technical fault were most likely to blame for the tragedy.
The TU-154 military aircraft crashed in the Black Sea near Sochi after disappearing from radar screens.
WHAT'S HAPPENING
The hijacker told crew he was "pro-Gaddafi," local media reported.
At least 32 people were airlifted to the hospital.