“There is credible information that an incident could occur during ASEAN,” says Special Agent Gibson, leading the Secret Service’s personnel brief in Manila. Pointing to a map of ISIS and ISIS-affiliated threat actors, she adds, “As of this week, the Philippines has escalated to a critical threat level.” (Days before the president’s visit, ISIS issued a series of threats—via video—that featured a picture of the president filled with bullets, and a message urging jihadists to “lie in wait” and “ambush” POTUS in the Philippines.)

Prior to President Trump’s arrival on Air Force One, a PID agent informs Special Agent Gibson that he’s come across a credible threat against POTUS—in the form of a tweet reading, “Gonna be in Manila the same time as Trump… I’ll take one for the team lads,” accompanied by a mugshot of Lee Harvey Oswald. And on his Instagram, they find a photo of the male suspect wielding a copy of the book How to Kill: The Definitive History of the Assassin. The PID agents then track his IP address and discover that the man is indeed located in downtown Manila, kilometers away from the president’s hotel, and his social media posts reveal that he is traveling in the direction of the president’s hotel. They continue to monitor him.