JOPLIN, MO - MAY 25: Tom Burkhart, of Karnes Pro Tire and Auto Center, pulls a nail from a tire on Shawn Campbell's storm-damaged car on May 25, 2011 in Joplin, Missouri. Burkhart has been fixing flat tires without charge since Monday morning. "At first we were just helping emergency crews," Burkhart said. "But now we are helping anyone who drives up." The tornado that ripped through the town of about 50,000 people May 22 is being called the deadliest single tornado in the U.S. in 60 years. (Photo by Julie Denesha/Getty Images)