On March 30, 2017, SpaceX made history.  

"Lighting the candle" on a Falcon 9 first stage rocket, which had previously made history -- SpaceX does this a lot -- by becoming the first rocket to land on a ship at sea, SpaceX re-launched said rocket to launch a Luxembourgian communications satellite to orbit. The rocket then landed, natch, on a ship at sea... again.

Since that flight, launchings, landings, and relaunchings of "flight-proven rockets," as SpaceX calls them, has become business as usual at Elon Musk's space upstart. Including the March 30 flight, SpaceX has now conducted a total of 259 successful rocket launches, 221 successful rocket landings, and 193 successful reflights of previously flown rockets, a feat unmatched by any other space company in the world.  

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Source Fool.com