In a letter to the editor, members of the National Physicians Alliance commend Philadelphia, Pittsburgh, and Lancaster for defending local gun regulations, including lost-or-stolen reporting, that protect communities. “Accidental and intentional shootings are the leading cause of death among Philadelphians ages 15 to 19, and more than 80 percent of homicides in 2013 involved guns. Our communities are made safer by requirements to report lost or stolen guns and to keep guns out of our city parks,” they write. “But even these basic rules are vulnerable under a new law that enables gun advocacy groups to sue cities even if they cannot show evidence of being harmed. This privilege, which does not exist on any other issue, will lead to costly court battles.”