Schofield and his group, after fleeing from the ground level hangar, make their way into the sublevels where they find a bedroom of a 6-year-old boy named Kevin who lives in a cube. Schofield's group then meets up with Riley's group, and the president reveals that the reason for his visit to Area 7 is to check on the progress of a vaccine being developed for the Sinovirus, a genetically engineered virus that differentiates between the amount of pigmentation in a person's skin, allowing it to target only people of a specific race (however people of Asian descent are immune). The president explains that to develop a vaccine for the Sinovirus (and protect America from biological weapons containing the Sinovirus) the scientists had to create a genetically engineered human, a boy named Kevin, whose blood could be used to produce antibodies, and the prisoners being held at Area 7 are used as guinea pigs to test the vaccine. Botha is killed during a chase on Lake Powell the President and Scarecrow escape to Area 8. When they reach it they realize Echo unit from the 7th squadron are being paid 120 million American dollars by the Chinese government to bring Kevin to them. Schofield and the President follow onto the 747 which has a mounted X-38 in an attempt to rescue Kevin. Schofield hijacks the X-38, escaping with the president and Kevin. Later, Schofield and Gant finally face off with Caesar back in Area 7. Characters US Marines Captain Shane "Scarecrow" Schofield : The commander of the US Marines in the President's security, Schofield is the main protagonist of the novel. Gunnery Sergeant Gena "Mother" Newman : A Marine and close friend of Schofield. Was presumed to have been killed by the 7th Squadron, but was later revealed to have cheated death. Her call sign is short for motherfucker. Staff Sergeant Elizabeth "Fox" Gant : Another Marine who is a close friend of Schofield and Mother. Together with Schofield, the two managed at the last moment to foil Caesar's revolutionary plan. Fox survived the events of the novel. Sergeant Buck "Book II" Riley Jr. : A young Marine who is the son of Schofield's deceased and loyal colleague, Book II urges Schofield to find the answers relating to his father's death. Although severely wounded, Book II survived the novel's events. Colonel Rodney "Hot Rod/ Ramrod" Hagerty : The pompous White