John Walter Ripley (June 29, 1939 – October 28, 2008) was a decorated United States Marine Corps Colonel who received the Navy Cross for his actions in combat during the Vietnam War. On Easter morning 1972, Captain Ripley repeatedly exposed himself to intense enemy fire over a three-hour period as he prepared to blow up an essential bridge in Dong Ha. His actions significantly hampered the North Vietnamese Army's advance into South Vietnam. The story of "Ripley at the Bridge" is legendary in the Marine Corps and is captured in a gripping diorama at the United States Naval Academy.