Disguised as a janitor, a man detonates a bomb at the center of the US Capitol building, causing the White House to be on lockdown. Finnerty is sent to escort the Speaker to an underground command center in the Pentagon, while Vice President of the United States Alvin Hammond (Michael Murphy) is taken aboard Air Force One. At the same time, mercenaries led by Emil Stenz (Jason Clarke), having infiltrated the White House by disguising themselves as audio-visual repairmen, quickly overwhelm the Secret Service, take the tour group hostage and seize the White House. Cale manages to escape to go find his daughter, who was separated from him during the tour, during a distraction caused by one of the security staff. Retiring Head of the Presidential Detail Secret Service Special Agent-in-Charge Martin Walker (James Woods) escorts Sawyer and his detail to the Presidential Emergency Operations Center. Once they gain access, Walker kills his detail, revealing himself to be the real leader of the attack on the White House. He wants vengeance against Sawyer after a botched black ops mission resulted in the death of his son. Cale kills a mercenary, takes his gun and radio, and rescues Sawyer when he overhears Walker talking about his plans.