Background checks and waiting periods for those who wish to purchase guns should be eliminated because they don’t deter（震慑）criminals and because they inconvenience law-abiding citizens. According to the Department of Justice, about 87 percent of violent crimes occur outside the home. That same agency reports that police respond to calls for help within 5 minutes only about 28 percent of the time. Furthermore, a study that analyzed data from all counties in the United States for the period of 1977-1992 found that those allowing their citizens to carry weapons saw a 7.65 percent reduction in murders, a 5.2 percent drop in rapes, and a 2.2 percent decrease in robberies.