Buildings Were Once Safe Havens from Explosive Drones. Fiber-Optics Changed That.

Troops in Ukraine desperately need to start shutting doors.

Another day, another indoor drone strike.

Tiny first-person-view drones weighing a few pounds and clutching small warheads have, for two years now, hounded troops and vehicles on both sides of Russia’s 38-month wider war on Ukraine.

But for most of those two years, the drones’ prey were fairly safe inside. After all, almost all FPVs were, until recently, controlled via wireless radio—and radio signals can’t always penetrate wood, brick and metal.