What is 1956 Grand Canyon mid-air collision?
{{Infobox Aircraft accident |name = United Airlines Flight 718<br/>TWA Flight 2 |image = 1956 Grand Canyon mid-air collision.png |caption = An artist's recreation of the collision. |date = June 30, 1956 |type = [[Midair collision]] |occurrence_type = Accident |site = 21,000 feet above the [[Grand Canyon]] |total_fatalities = 128 (all) |total_survivors = 0 | plane1_image = UAL DC-7 (cropped).jpg | plane1_image_upright = 1.35 | plane1_caption = A United Airlines DC-7, similar to the one in the accident | plane1_type = [[Douglas DC-7|Douglas DC-7 Mainliner]] | plane1_operator = [[United Airlines]] | plane1_tailnum = {{Airreg|N|6324C}} | plane1_name = ''Mainliner Vancouver'' | plane1_origin = [[Los Angeles International Airport|Los Angeles Int'l Airport]] | plane1_destination = [[Chicago Midway Airport]] | plane1_passengers = 53 | plane1_crew = 5 | plane1_fatalities = 58 | plane1_survivors = 0 | plane2_image = | plane2_image_upright = 1.35 | plane2_caption = The Lockheed L-1049A Super Constellation involved <!----> | plane2_type = [[Lockheed L-1049A Super Constellation]] | plane2_operator = [[Trans World Airlines]] | plane2_tailnum = {{Airreg|N|6902C}} | plane2_name = ''Star of the Seine'' | plane2_origin = [[Los Angeles Int'l Airport]] | plane2_destination = [[Kansas City Downtown Airport]] | plane2_passengers = 64 | plane2_crew = 6 | plane2_fatalities = 70 | plane2_survivors = 0 }} {{Location map |USA |relief = 1 |label = |lat = 36.175 |long = -111.8333 |caption = Location in the [[United States]] |marksize = 5 |float = |background = |width = 240 }} The 1956 Grand Canyon was a mid-air collision that happened on Saturday, 30 June 1956 at 11:31 am [[Mountain Standard Time]]. A [[United Airlines]] plane running as United Airlines Flight 718 hit another airplane owned by [[Trans World Airlines]] ''(TWA)'', operating as Trans World Airlines Flight 2. The aircraft involved was a [[Douglas DC-7]] and a [[Lockheed L-1049 Super Constellation]]. The crash happened o