Advanced lung cancer patient gets a "miracle" after targeted radiation -- and medical mystery persists

Jeff Gordon, Greg Biffle

Jeff Gordon, driver of the #24 DuPont Chevrolet races Greg Biffle, driver of the #16 U.S. Census Ford during the NASCAR Sprint Cup Series Food City 500 at Bristol Motor Speedway on March 21, 2010 in Bristol, Tennessee
Jason Smith, Getty Images for NASCAR
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