$240 million drone vanishes into thin air

A $238 million drone mysteriously vanished during the war with Iran earlier this month — only for the Navy to later confirm it had crashed in a mishap. The episode marks the MQ-4C’s first major accident in active service, but raises concerns about its reliability in practice.What went wrong?On April 9th, an MQ-4C surveillance drone, which can intercept and interpret electronic signals (signals intelligence, or SIGINT), disappeared over the Persian Gulf. Before crashing, the drone emitted, or "sq...