The ultimate high ground: Russia and US try to set rules for space weapons

Russian and U.S. negotiators met in Vienna this week to discuss a danger that has become increasingly urgent in recent years: how to curb the militarization of space.

Unless a new treaty, or at least a general understanding, is soon established, experts say, the future of human activity on “the final frontier” is going to look more like Star Wars than Star Trek.

There’s a lot to talk about. Last week the newly-minted U.S. Space Force accused Russia of deploying a “projectile weapon” in near-Earth orbit close to a U.S....