chunk: The Marines commandeer a city bus for evacuation. They also vivisect a wounded alien with the help of Santos and find a vulnerable spot in its torso, as well as learning that the alien aircraft are drones that track down humans through radio transmissions. Santos reveals that her original mission was to locate the aliens' central command center, believing that its destruction would deactivate the drones. On the I-10 freeway, the bus comes under attack. Because the off-ramp is destroyed, the Marines are forced to rappel the civilians off the freeway. Marines Stavrou (Pesi) and Mottola (Liao) and the National Guard soldiers are killed, while Joe and Lieutenant Martinez are wounded. Martinez detonates explosives inside the bus, killing himself and the aliens, leaving Nantz in command. The surviving Marines Nantz, Santos, Imlay, Kerns, Lockett, Harris, Adukwu and the civilians escape the bombing zone. A news report speculates that the aliens are seeking Earth's water for fuel while