4 entries match your criteria. Related Historical MarkersTo better understand the relationship, study each marker in the order shown. 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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