A Ukrainian air-defense sergeant says missiles aren't his most challenging shortage. It's the gear that finds enemy targets.

MANPADS can stop Russian drones, missiles, aircraft, and helicopters. AP Photo/Andriy Andriyenko, File A Ukrainian sergeant said supporting gear is harder to get for his air defense unit than missiles. It uses MANPADS that down Russian jets and aircraft, but needs batteries and ways to find targets. Equipment like drone detectors and electronic warfare systems is "hard to get," he said. The hardest shortage facing one Ukrainian shoulder-fired air-defense unit isn't necessarily missiles, its...