The World's Biggest Passenger Plane, the A380, Is Dead. Here's What Killed It

The aviation graveyard is littered with superlative aircraft that didn’t stay in the air for long. There’s Howard Hughes’ “Spruce Goose,” then the largest plane ever built and designed as a military hauler, which flew just once (a very generous definition of “flew”), but arrived too late for its intended role in World War II.…