What to do when the wrong procedure is performed? In this first installment of JAMA Performance Improvement: Do No Harm we explore the options for dealing with this very difficult problem with Tami Minnier, RN, MSN, Paul Phrampus, MD, Linda Waddell, RN, MSN, and David Baker, MD, MPH, FACP. Air traffic audio courtesy of LiveATC.net, used with permission.