Original sentence: Department of State, Office of the Historian.Four days after Powers disappeared, NASA issued a very detailed press release noting that an aircraft had “gone missing” north of Turkey.The U–2 airplane incident, according to the U
Edited sentence: Burrows, William E.Deep Black.Department of State, Office of Historian.Four days after Powers  issued a very detailed press release noting that an aircraft had “gone missing” north of Turkey.New York, NY: Random House, 1986.Orlov, Alexander The U-2 Program: A Russian Officer Remembers (excerpt).The U-2 Incident 1960, according to U