May 1971

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May 1, 1971: Amtrak begins operations for all U.S. passenger train service
May 25, 1971: Soviet Tu-144 supersonic plane first brought to the West
May 11, 1971: The margarita becomes the first mass-produced cocktail [1]
May 20, 1971: U.S. Boeing 2707 "SST" supersonic plane development cancelled

The following events occurred in May 1971:

  1. ^ attribution:Jon Sullivan