On December 22, registered nurse and fourth-year medical student Meredith Graves, from Tennessee, was visiting the 9/11 Memorial in New York City. Ms. Graves, rather than abdicating responsibility for her security to others, was carrying a defensive handgun, as she is licensed to do in Tennessee. That, unfortunately, avails her nothing in New York. When she saw the "No Guns" sign before entering, she did her best to comply with the law, asking a security guard where she could check her gun. The guard directed her to a police officer, who promptly arrested her for violation of New York's laws...