Infineon Raceway SONOMA, Calif. (May 16, 2010) ACTION SHOT OF Shawn Higbee (22) and MIchael Barnes (80) WINNER'S CIRCLE SHOT (L-R) Michael Barnes, Shawn Higbee and Mike Hannas PHOTOS BY MIKE FINNEGAN Shawn Higbee took the historic victory on Sunday at Infineon Raceway in the TTXGP U.S. Championships, marking the first-ever zero-carbon motorcycle race in the United States.