Editor’s note: This story was updated to correct information about Roc’s fuselage design. MOJAVE, Calif. — In Middle Eastern mythology, the Roc is a large bird, strong enough to carry an elephant in its talons. Stratolaunch’s massive Roc aircraft, named after the griffin-like creature, can carry as much as 500,000 pounds of payload, the equivalent of more than 33 large elephants. With a wingspan that stretches 385 feet, it’s the widest airplane in operation — and it takes up an entire hangar at