Original sentence: The 2009 Hudson River mid-air collision occurred on August 8, 2009, at approximately 12:30 pm (16:30 UTC) when a tour helicopter and a small plane collided over the Hudson River.The helicopter was a Eurocopter AS350
Edited sentence: The 2009 Hudson River mid-air collision occurred on August 8, 2009, at approximately 12:00 pm (16:00 UTC) when a tour helicopter and a small plane collided over the Hudson River.The helicopter was a Eurocopter AS350, which took off from the West 30th Street Heliport