After a man walked into the Charlotte civil courthouse with explosives, WSOC-TV tested the overall awareness to a potential threat, i.e. Oklahoma City or the World Trade Center bombing. A rented truck similar to the ones used in those incidents was driven to several sites around the county. The sites included city, county and federal buildings, the airport and companies that operate gasoline storage tanks. The authors found varying levels of awareness. A nationally-known security expert pointed out the weaknesses, and the authors gave the sites time to make changes or respond before the story aired.