The Department of the Air Force issued a Notice of Intent to prepare a Supplemental Environmental Impact Statement (SEIS) for the expansion of the Foreign Military Sales F-35 Pilot Training Center at Ebbing Air National Guard Base, Arkansas. The SEIS supplements the 2023 FMS PTC EIS and the March 2023 Record of Decision, which selected Ebbing ANG Base. New FMS purchases of F-35 aircraft, including F-35B STOVL operations, require additional capacity. Three alternatives are analyzed: a Proposed Action (adding 12 F-35s, STOVL operations, new facilities), a Refine Operations Alternative (modified flight operations for existing 24 aircraft without beddown), and No Action. The FAA Airports Division is a cooperating agency due to Airport Layout Plan changes.1