A train operator was killed today while testing a new light rail system that is supposed to link Kennedy Airport with other public transportation.The Port Authority says three cars of the AirTran derailed just before 12:30 P-M, injuring the 23-year-old train operator. Kelvin DeBourgh died a few hours later at Jamaica Hospital.DeBourgh worked for Bombardier, the company that designed and built the train.The Port Authority is investigating what caused the train to derail.The train was scheduled to begin service by the end of the year. Leo/ORD Email me at KLM_India@yahoo.com or LFutia@aol.com. The choice is yours. Take your pick! I check both.