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...
why did we leave the holes they 
made instead of sealing them?
¿por qué los líderes no ordenaron bloquear las 
rutas subterráneas de aparición y las ignoraron?
¿por qué los líderes no ordenaron bloquear las 
rutas subterráneas de aparición y las ignoraron?
então por que não tapamos os buracos que eles fizeram?