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.

This morning, August 26, Russian troops attacked the Dnipropetrovsk region with drones and caused a fire, according to Serhii Lysak, head of the Dnipropetrovsk regional military administration. "At night and in the morning,