A massive force of underground BETA is heading towards the Soviet Base, and there's no time to do anything but pack up and leave. Yui stays behind to destroy the Type 99 Cannon, but the Soviets want it for themselves...
Somebody in the Soviet Military 
was hiding it from us.
Alguien del ejército soviético 
ocultó la información.
Alguien del ejército soviético 
ocultó la información.
Alguém nas forças soviéticas estava escondendo isso de nós.