Context : The 1956 Atlantic R6D-1 disappearance involved a Douglas R6D-1 Liftmaster (BuNo 131588) of the United States Navy which disappeared over the Atlantic Ocean on 10 October 1956 with the loss of all 59 people on board. 
Answer : 10 October 1956
On what date did 1956 Atlantic R6D-1 disappearance occur?