It was the company's fourth zone landing and the 10th overall successful landing of the first stage booster.
Spectator Stephen Marr said watching the launch was thrilling.
“I think it is good for SpaceX that they are able to get these contracts,” Marr said. “It has been ULA only for so long.”
Marr said he values competition in the space industry.
“It is good to see it competed for,” he said. “(To) see SpaceX just have that extra revenue stream to do all the awesome things that they say they are going to do.”