Three days after the commissioning, a strange incident transpired. North of the UN line and at an altitude of 9,500 feet, a F-84 Thunderjet fighter, with U.S. Air Force markings and insignia, attacked a propeller-driven Air Force trainer. The slower plane immediately began defensive maneuvering, flying in tight circles. After making five turns, the trainer pilot saw the supposedly friendly jet fly off. It was believed that such a paradoxical occurrence was due to the substantial number of F-84 losses and the enemy’s ability to piece together and fly an aircraft of that model. A few similar episodes--attacks by apparently friendly aircraft on UN planes--had previously taken place. In each case, the impostor was a model of U.S. aircraft that had suffered particularly heavy losses. Another incident in September had dire consequences. On the 10th, MAG-33 dispatched 22 fighter aircraft from VMF-115 (Lieutenant Colonel Royce W. Coln) to attack reported troop concentrations near Sariwon, 35 miles directly south of Pyongyang. The F9F Panther jets had completed the strike and were returning to their K-3 base when they were diverted to land at K-2, Taegu, where the weather was better. Fog had suddenly swept over the field at K-3, reducing visibility to zero. Sixteen Panthers landed safely at K-2, 45 miles southwest of the Marine field at Pohang. The remaining six, piloted by Majors Raymond E. Demers and Donald F. Givens, First Lieutenant Alvin R. Bourgeois, and by Second Lieutenants John W. Hill, Jr., Carl R. Lafleur, and Richard L. Roth, flying in formation in poor weather, crashed into the side of a 3,000-foot mountain while descending.[247] They would have required only an additional 600 feet of altitude to clear the summit. [247] Although not definitely proven, there were “some indications of false radio beacons being used by the enemy in clandestine operations in the K-2 area.” _Jack ltr._