https://www.cnet.com/news/spacex-falcon-heavy-elon-musk-clear-launch-tower-kennedy-space-center/

The demonstration launch has already been historic in multiple other ways.

For the first time ever, a pair of recycled boosters helped send a heavy payload to space. Only eight minutes later, those same two Falcon 9 side boosters returned and landed simultaneously at adjacent landing pads at Florida's Cape Canaveral Air Force Station, a sight unlike anything ever seen in spaceflight.