I photographed these Douglas D-558-II Skyrocket examples at the National Air & Space Museum and the Planes of Fame museum in Chino.
The difference between the D-588-1 Skystreak and D-588-2 Skyrocket series the original batch was jet-powered with straight wings and the three Skyrocket series planes were jet and rocket-powered with swept wings.
Douglas D-558-II #1 (NACA-143)
Planes of Fame, Chino 2018
Douglas D-558-II #2 (NACA-144)
Smithsonian NASM 2015
This was the first aircraft to fly Mach 2.