Photograph of Senator John F. Kennedy (right) with Anthony J. Celebrezze (left), Mayor of Cleveland, Ohio and Allen C. Thompson (center), Mayor of Jackson, Mississippi at a meeting of the American Municipal Association held in Denver, Colorado. Stamped on verso: "Photo. By: Ralph H. Hargrove; Identification Bureau, Police Department,Jackson, Mississippi." Photograph of Senator John F. Kennedy, Allen C. Thompson, and Anthony J. Celebrezze  Papers of John F. Kennedy. Pre-Presidential Papers. Presidential Campaign Files, 1960. Campaigns by State: Pre-Convention Political Files, 1960. Photo.   By: Ralph H. Hargrove; Identification Bureau, Police Department, Jackson, Mississippi."