The Striker drone belongs to the growing class of so-called deep-strike drones designed to hit high-value targets far behind enemy lines.

The Striker drone belongs to the growing class of so-called deep-strike drones designed to hit high-value targets far behind enemy lines.

Ukraine's long-range drones are striking deep inside Russia, up to 1,200 miles away, hitting oil refineries and depots. NPR recently spent time with one of the Ukrainian strike…