Tucked into a rust-red valley where copper veins cut the hills like old scars, the plant began life as a radio tower works—filaments and glass, men in aprons soldering little suns. By the time the company that owned it became legendary for “phones that lasted longer than promises,” the factory had bloomed into something else entirely: an endless humming cathedral of conveyor belts and blinking panels, and its heart was a machine the engineers jokingly called the Firehose.