04.01.2018 - 06:56 [ Mark Kelly, Navy combat veteran & retired NASA astronaut. Commanded final launch of Space Shuttle Endeavour / Twitter ] As a pilot in the @USNavy, I was trained to deliver nuclear weapons. EVERYTHING we did with these weapons was deadly serious. No jokes, no threats, no mistakes. Every soldier, sailor, airman and marine gets that. Feel free to reach out if you’d like to discuss this further.