The Government of Switzerland requested to buy up to forty (40) F-35 Joint Strike Fighter Conventional Take Off and Landing (CTOL) aircraft; forty-six (46) Pratt & Whitney F-135 engines; forty (40) Sidewinder AIM-9X Block II+ (Plus) Tactical Missiles; fifty (50) Sidewinder AIM-9X Block II Captive Air Training Missiles (CATMs); six (6) Sidewinder AIM-9X Block II Special Air Training Missiles (NATMS); four (4) Sidewinder AIM-9X Block II Tactical Guidance Units; ten (10) Sidewinder AIM-9X Block II CATM Guidance Units; eighteen (18) KMU-572 JDAM Guidance Kits for GBU-54; twelve (12) Bomb MK-82 500LB, General Purpose; twelve (12) Bomb MK-82, Inert; twelve (12) GBU-53/B Small Diameter Bomb II (SDB II) All-Up Round (AUR); and eight (8) GBU-53/B SDB II Guided Test Vehicle (GTV). Also included are Electronic Warfare Systems; Command, Control, Communications, Computer and Intelligence/Communications, Navigational, and Identification (C4I/CNI); Autonomic Logistics Global Support System (ALGS); Autonomic Logistics Information System (ALIS); Full Mission Trainer; Weapons Employment Capability and other Subsystems, Features, and Capabilities; F‑35 unique infrared flares; reprogramming center access; F-35 Performance Based Logistics; software development/integration; flight test instrumentation; aircraft ferry and tanker support; Detector Laser DSU-38A/B, Detector Laser DSU-38A(D-2)/B, FMU-139D/B Fuze, KMU-572(D-2)/B Trainer (JDAM), 40 inch Wing Release Lanyard; GBU-53/B SDB II Weapon Load Crew Trainers (WLCT); Cartridge, 25 mm PGU-23/U; weapons containers; aircraft and munitions support and test equipment; communications equipment; spares and repair parts; repair and return support; personnel training and training equipment; publications and technical documents; U.S. Government and contractor engineering, technical, and logistics support services; and other related elements of logistical and program support. The total estimated cost is $6.58 billion.