Last week, the six-man crew of the International Space Station awoke to find that they’d sprung a leak, some 250 miles above earth’s surface. It was first identified via a noticeable, but not catastrophic, drop in oxygen levels within the crew compartment, but it wasn’t long before the readings were confirmed with good old fashioned observation: it was soon clear that a small, 2 millimeter in diameter, hole had been ripped through the hull of a docked Soyuz resupply capsule. Tiny as the leak was, the space station was venting oxygen and something needed to be done.

German astronaut Alexander Gerst was reportedly the first to find the leak, and according to initial reports, he promptly plugged it with his finger while a temporary solution could be thrown together, though that version of events has since been contested by Russian cosmonauts who recently took to social media to show off their more permanent repair.

That repair was itself the subject of some tension between the American commander of the International Space Station and the two Russian cosmonauts on board. Their parent command, Roscosmos, issued an order to carry out permanent repairs on the hole before the ISS Commander felt confident that it had been properly tested. Roscosmos dismissed NASA Astronaut Drew Feustel’s repeated requests to postpone the repairs until they had been adequately tested, and the two cosmonauts on board, Sergey Prokopyev and Oleg Artemyev, set about using epoxy and fabric to seal the leak. A bubble did form in the epoxy that prompted concerns about how permanent their solution had been, but it seems those early concerns have given way now that the repair has fully cured.

Sealing the hole, however, only solves half the problem. How the hole got there remains the subject of a Russian led investigation that was announced in conjunction with a dramatic revelation. The general public had been operating under the assumption that the leak had been caused by an impact with a microscopic orbital body or bit of space junk — a growing threat to all orbital operations. Instead, however, the evidence seemed to suggest that the tiny hole had been drilled from the inside out.