Regulus Missile Mail

https://postalmuseum.si.edu/collections/object-spotlight/regulus-missile-mail?fbclid=IwAR1K6yNr_STqOtSIweP2VgHWmeD7GnkbA_RuO3gZT9cQbwG32J1VSHt3J9E
Now this is a cool story...mail delivered by missile!

On June 8, 1959, the US Navy fired a Regulus I missile from the USS Barbero (SSG-317) and directed it to land at the Naval Auxiliary Air Station at Mayport, Florida, near Jacksonville. While the sub was docked at Norfolk, Virginia, Postmaster General Arthur Summerfield helped place two blue and red metal containers, holding 3,000 letters, inside the sub’s missile prior to the flight.