Rock Island Arsenal is located on an island on the Mississippi River between the cities of Davenport, Iowa, and Rock Island, Illinois. It has a group of historic cannons on display and the largest one is known as Atomic Annie, The M65 atomic cannon shot 11 in diameter projectiles over 20 miles. It also had the capability of shooting nuclear projectiles. It was developed in the 1950s but was decommissioned in the 1960s. It was determined it was easier to use airplanes instead of cannons.
Rock Island Arsenal is still an active military base but the do allow visitors to enter, after a background check, to see the historic sites and museum.
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