There’s a lot of junk in space. Tens of thousands of pieces of it, circling the Earth at thousands of miles per hour. Each piece is an orbital bullet that can endanger satellites, manned capsules, and the International Space Station.

The European Space Agency is about to pull one of the bigger hunks of garbage from orbit. But there’s a problem: The same tech that could help make space cleaner might, in the long run, also make it more dangerous.

That’s because the ESA’s ClearSpace-1 orbital garbage truck, as well as other spacecraft like it, could double as a weapon.

Swiss startup ClearSpace designed the ClearSpace-1 vehicle to intercept a chunk of debris, latch onto it, and drag it back into Earth’s atmosphere where it can safely burn up. The ESA has scheduled the clean-up mission for 2025 and has even identified its target: a 265-pound piece of an old rocket orbiting 310 miles above Earth’s surface.

The 2025 mission will involve what ClearSpace CEO Luc Piguet called “non-cooperative capture.” That is to say, the targeted piece of debris wasn’t designed with an interface or any other system that might help a clean-up craft grab onto it.

Read more: yahoo