If SpaceX pulls off Thursday's 2 launches 4h17m apart, it will be the shortest time between 2 launches at KSC/CC since 1966, when, on 4 occasions, an Atlas launched an Agena Target Vehicle, which a crewed Gemini capsule then launched 100 minutes later and rendezvoused with.
I wonder if we have seen anything like that globally since then - maybe Baikonur or Plesetsk had that during the Soviet times. Closest thing to this in recent times was by the Chinese in Dec. 2019, however it was of much smaller and simpler LVs:https://www.nasaspaceflight.com/2019/12/china-double-kuaizhou-1a-launch-taiyuan/ …