Ukraine's air force said Russia launched 72 drones and one Iskander-M ballistic missile into the country in its latest overnight barrage, of which 48 drones were intercepted or suppressed. The missile and 24 drones impacted across 10 locations, the air force said.

Many of the drones aren’t particularly fast or high-tech, but they are cheap enough for the Kremlin to launch more than 700 in one night, in an effort to overwhelm Ukraine’s air defenses. Here’s what we know.