The shocking death of Greg Biffle and his family in a North Carolina plane crash on Thursday, December 18 still has the racing world asking more questions than they have answers. For former NASCAR driver Mark Martin, a veteran pilot himself, frustrations are reaching a boiling point. “As a Citation pilot for 20 years and a product of around 75 days of [Flight Safety International] training and over 3000 hours of flight time in the aircraft I have deep knowledge of these aircraft and performance,” Martin, 66, wrote via X on Monday, December 22. “The more I learn about Biffle’s crash the more di...

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