Pilots flew on two person Gemini missions and Apollo Nights to the moon these were the last Air Force officers to serve as pilots
Which correctly shows where a semicolon is needed in the sentence?
Pilots flew on two person Gemini missions and Apollo Nights to the moon these were; the last Air Force officers to serve as pilots.
Plots flew on two person Gemini missions and Apollo Nights to the moon; these were the last Air Force officers to serve as pilots
Pilots flew on two person Gemini missions, and Apollo flights to the moon these were the last Air Force officers to serve as pilots.
Pilots flew, on two person Gemini missions and Apollo flights to the moon these were the last Air Force officers to serve as pilots.