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SpaceX's first Falcon 9 Block 5 rocket rolls toward Launch Pad 39A at NASA's Kennedy Space Center in Florida ahead of its planned May 10, 2018, liftoff. Credit: Elon Musk/Instagram

SpaceX's first "Block 5" Falcon 9 rocket launches Bangabandhu Satellite-1 for the government of Bangladesh on May 11, 2018. SpaceX wants to land and, within 24 hours, relaunch a Block 5 first stage before the end of 2019, company founder and CEO Elon Musk said. Credit: SpaceX

Falcon-9 Block 5 sticks the barge landing on the "Of Course I Still Love You." Credit: SpaceX