anileany le less palpable. while garcia and team accomplish their mission, chang's squad is already in the town. how would you say everything is going? >> so far going all right. >> push, push, push. >> go ahead. >> even after 16 hours, the battle simulation is far from over. throughout the night, the marines will take turns defending the town. obviously it's pitch black and we can't use a lot of light because if the enemy sees light, you could be dead. and come dawn, they will face their last and biggest test, the final battle with big guns and live ammo.