Chris Coatney, of Livermore, cleans the windshield on his 1957 Chevy Bel Air during the Hot Summer Nights car show in downtown Danville, Calif., on
Chris Coatney, of Livermore, cleans the windshield on his 1957 Chevy Bel Air during the Hot Summer Nights car show in downtown Danville, Calif., on Thursday, July 18, 2013. This is the 19th year the free car show has been held. The next show will be held on August 15 from 4 to 9 p.m. This year to honor the 50th anniversary of the Chevrolet Corvette, car show organizers have invited members of Corvette clubs from throughout Northern California to show their Corvettes of all years. (Doug Duran/Bay Area News Group)