SR Heritage Festival August 23, 2010 Last Updated: August 23, 2010 12:19 PM Community L.D. Williams of Dragon Fly Balloons works his magic Saturday during the Slippery Rock Heritage Festival at Slippery Rock University. Classic and muscle cars were on display as part of the festival's car cruise. The festival promotes local history. Continue Reading with One of the Options Below Become a Butler Eagle Subscriber Today Subscribe to read the full article and support our local, independent news organization. Subscribe Today Already a subscriber? Sign in Here You can cancel any time. Share this article: Order Photo Reprints: More in Community Vitalant blood drives Equestrian sessions for veterans funded by VA grant to Slippery Rock University Pop-Up Shoppe coming to Cranberry Public Library as fundraiser Glade Run Church planning community dinner Operation Christmas Child provides joy around the world Butler high school Distinguished Graduate Award nominations open