FYI: NASA has sent a snatch-and-grab spacecraft to an asteroid to grab some rock and send it back to Earth

Off-planet manic miner reaches orbit around its prey: Bennu

NASA's mission to send a probe to an asteroid, dig up a chunk, and send the material back to Earth is now half-way complete. The agency says its OSIRIS-REx spacecraft has reached its hunk-of-rock target after a trip lasting two years and two billion miles."