911 wasn't the only aviation disaster to happen in New York. The 1960 New York mid-air collision, also known as the Park Slope Plane Crash, was a mid-air collision between two airliners that occurred over New York City on Friday, 16 December 1960. https://www.youtube.com/embed/gYwTtgC-k1Y#t=23 The collision of United Airlines Flight 826 and Trans World Airlines Flight 266 caused Flight 266 to crash into Staten Island and Flight 826 to crash into Park Slope, Brooklyn, resulting in the deaths of all 128 people on board the two airliners and six people on the ground.