Yes, you must go through Transportation Security Administration (TSA) screening for international flights departing from any airport within the United States. The security process for an international traveler is virtually identical to that of a domestic traveler, involving the scanning of carry-on luggage and passing through a body scanner or metal detector. You are still subject to the "3-1-1" rule for liquids and must remove large electronics like laptops from your bag unless you are using TSA PreCheck. The primary difference for international travel occurs at the "document check" station; instead of just a driver's license, you must present a valid passport and, in some cases, your boarding pass. It is important to remember that TSA handles the physical security of the aircraft, while U.S. Customs and Border Protection (CBP) handles the legal entry and exit of people and goods. Therefore, while you "exit" via TSA, you generally do not clear "Customs" until you arrive at your international destination or upon your return to the U.S. (unless you are at a Preclearance airport).