4 entries match your criteria. Related Historical MarkersThese HMDB listings are the three Atomic Cannons still in existence. By Lee Hattabaugh, May 10, 2011 The Atomic Cannon Marker SHOWN IN SOURCE-SPECIFIED ORDER1► Kansas (Geary County), Fort Riley — The Atomic Cannon — 2► Maryland (Harford County), Aberdeen — Aberdeen Proving Ground — ↢ Four Miles — 3► Virginia (Newport News), South Newport News — A Behemoth in the Field — 4► Oklahoma (Comanche County), Fort Sill — 280mm Heavy Motorized Gun M65 — (Gun Nr. 21 on Carriage Nr. 3) —
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