Remembering 'LEFTurn': NASCAR commemorates the late Jason Leffler

It's been one year since the racing world lost Jason Leffler. 

The 37-year-old, a two-time winner on the NASCAR Nationwide Series, was killed during a Sprint Car race at New Jersey's Bridgeport Speedway on June 12, 2013. Many in the NASCAR community took to Twitter to honor the driver known as "LEFTurn."