Three U.S. Air Force pilots aboard an unarmed T-39 Sabreliner were killed when the aircraft was shot down over Erfurt, East Germany, by a Soviet MiG-19.

The North American Sabreliner, later sold as the Rockwell Sabreliner, is an American mid-sized business jet developed by North American Aviation. It was offered to the United States Air Force (USAF) in response to its Utility Trainer Experimental (UTX) program. It was named "Sabreliner" due to the similarity of the wing and tail to North American's F-86 Sabre jet fighter. Military variants, designated T-39 Sabreliner, were used by the USAF, United States Navy (USN), and United States Marine Corps (USMC) after the USAF placed an initial order in 1959. The Sabreliner was also developed into a commercial variant.

On 28 January 1964, an unarmed T-39 Sabreliner aircraft of the United States Air Force (USAF) was shot down while on a training mission over Erfurt, East Germany, by a MiG-19 jet fighter of the Soviet Air Force. The occupants of the aircraft were Lieutenant Colonel Gerald K. Hannaford, Captain Donald Grant Millard, and Captain John F. Lorraine. All three died, becoming direct casualties of the Cold War in Europe.

Erfurt (German pronunciation: [ˈɛʁfʊʁt] ) is the capital and largest city of the Central German state of Thuringia, with a population of around 216,000. It lies in the wide valley of the River Gera, in the southern part of the Thuringian Basin, north of the Thuringian Forest, and in the middle of a line of the six largest Thuringian cities, stretching from Eisenach in the west, via Gotha, Erfurt, Weimar and Jena, to Gera in the east. Together with Kassel and Göttingen, it is one of the cities with more than 100,000 inhabitants lying closest to the geographic centre of Germany. Erfurt is 100 km (62 mi) south-west of Leipzig, 250 km (155 mi) north-east of Frankfurt, 300 km (186 mi) south-west of Berlin and 400 km (249 mi) north of Munich.