The Marines commandeer an abandoned transit bus for the evacuation. En route, they deduce that the alien air units are drones that target human radio transmissions. Santos reveals that her mission is to locate the aliens’ command and control center, as its destruction should deactivate the drones. When their bus comes under attack on an elevated freeway, the Marines rappel the group to street level. In the ensuing battle, Marines Stavrou and Mottola and the remainder of the Army National Guard soldiers are killed, while both Joe and Lieutenant Martinez are wounded fighting…