1956 Grand Canyon mid-air collision

The 1956 Grand Canyon mid-air collision occurred on Saturday, 30 June 1956 at 10:30 AM Pacific Standard Time when a United Airlines passenger airliner struck a Trans World Airlines (TWA) airliner over the Grand Canyon in Arizona, resulting in the crash of both planes, 128 fatalities, and no survivors. It was the first commercial airline crash to result in more than one hundred deaths, and would lead to sweeping changes in the control of flights in the United States.

• http://en.wikipedia.org/wiki/1956 Grand Canyon mid-air collision