According to one story, German intelligence found the phrase on captured American equipment. This led Adolf Hitler to believe that Kilroy could be the name or codename of a high-level Allied spy. At the time of the Potsdam Conference in 1945, it was rumored that Stalin found "Kilroy was here" written in the VIP bathroom, prompting him to ask his aides who Kilroy was.[1][10] War photographer Robert Capa noted a use of the phrase at Bastogne in December 1944: "On the black, charred walls of an abandoned barn, scrawled in white chalk, was the legend of McAuliffe's GIs: KILROY WAS STUCK HERE."[11]