So, on Monday SpaceX did a static test fire of their next Falcon 9. This one will, hopefully, launch a payload to orbit next week. But the spiffy thing is that it *already* launched a payload to orbit, a Dragon ISS resupply mission in April 2016.
SpaceX has a pretty good record of recovering their boosters. That’s handy on its own… by recovering a booster, SpaceX can examine it for wear and tear and whatnot to make future boosters better. But the real goal is of course to make them as reusable as a jetliner. Successfully pulling off this next launch and recovery will go a long way towards making that goal happen.