Cholo Abdi Abdullah was charged with six counts of terrorism-related offenses arising from his activities as an operative of the foreign terrorist organization al Shabaab, including conspiring to hijack aircraft in order to conduct a 9/11-style attack in the United States. Abdullah was arrested in July 2019 in the Philippines on local charges, and was subsequently transferred on Dec. 15, 2020 in connection with his deportation from the Philippines to the custody of U.S. law enforcement for prosecution on the charges in the indictment. Beginning in 2016, at the direction of a senior al Shabaab commander who was responsible for, among other things, planning the 2019 Nairobi hotel attack, Abdullah traveled to the Philippines and enrolled in a flight school there (the "Flight School"), for the purpose of obtaining training for carrying out the 9/11-style attack. Between 2017 and 2019, Abdullah attended the Flight School on various occasions and obtained pilot's training, ultimately completing the tests necessary to obtain his pilot's license. While Abdullah was obtaining pilot training at the Flight School, he also conducted research into the means and methods to hijack a commercial airliner to conduct the planned attack, including security on commercial airliners and how to breach a cockpit door from the outside, information about the tallest building in a major U.S. city, and information about how to obtain a U.S. visa.