On February 20th, 1959, the Canadian government Prime Minister decided to cancel the Avro Arrow project, indirectly putting 30,000 people out of work. The Avro Canada CF-105 Arrow was a "delta-winged" interceptor aircraft, designed in the early 1950s for use in the RCAF.
Wikipedia has an excellent description of the design and testing of the aircraft, along with a description of the ending of the project in 1959, which I have linked to above.
