The world's largest passenger airliner touched down at JFK yesterday. The NY Daily News has a thorough description of the "superjumbo jet" that includes amenities such as an on-board lounge with a massage system, bathrooms where passengers can shower, and an entertainment system with more than 1,200 channels to choose from. The Emirates Airbus A380 completed its 13 1/2 hour flight from Dubai in such comfort that passengers "felt like they had just emerged from......