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Built in partnership with General Motors and Honeywell, Jay Leno’s EcoJet is powered by a LTS-101 turbine jet engine normally reserved for US military attack helicopters. It was converted to run on biofuel diesel. The EcoJet looks like a Ferrari and a modern day Cadillac had a baby, but Jay promises Dr. Tyson this thing is all muscle and its speed is blisteringly fast. So fast in fact, it might do a bit more harm than good.