The Aldrin Dome Collapse was a disaster on Luna in the late-22nd century.
In 2187, the dome of the Aldrin Colony collapsed, leading to the deaths of thousands. Fortunately, Dennis Ashton, a citizen of the colony led hundreds more to freedom in the aftermath of the collapse. The tunnels led them to Armstrong City, where the survivors received medical treatment.
After the colony was rebuilt, a statue was erected in honor of Ashton.