Video shows plane skidding without landing gear before explodingTwo people rescued alive, fire agency saysJeju Air flight was arriving from BangkokAircraft was Boeing 737-800, airline saysDeadliest S. Korea air crash since 1997 MUAN, South Korea, Dec 29 (Reuters) – At least 130 people were killed when an airliner landed without wheels, veering off the runway…