Michael Schmitt, a professor of law at the U.S. Naval War College and University of Exeter in England, poses for a picture at the Victory Services Club, in London, Friday, March 24, 2017. Schmitt is one of a disparate group of experts campaigning against the layperson definition of &quot;cyberattack&quot; that they argue can lead to dangerous diplomatic missteps. (AP Photo/Tim Ireland)