Like most other aviation calamities, the 583 people killed in 1977 when a KLM 747 struck a Pan Am 747 at Tenerife resulted not from a single error or failure, but from a chain of improbable errors and failures, together with a stroke or two of really bad luck.
The Tenerife disaster takes place, the Eurofighter Typhoon makes its first flight, Concorde flights to Miami begin, and more…