What year did a Titan II missile blow up in its silo?

Titan II Missile Explosion (1980)

The Titan II Launch Complex 374-7 in Southside (Van Buren County), just north of Damascus (Van Buren and Faulkner counties), became the site of the most highly publicized disaster in the history of the Titan II missile program when its missile exploded within the launch duct on September 19, 1980. An Air Force airman was killed, and the complex was destroyed. The Titan II Missile Launch Complex 374-7 Site was listed in the National Register of Historic Places on February 18, 2000.

At about 3:00 a.m., the missile exploded, blowing the 740-ton launch duct closure door 200 feet into the air and some 600 feet northeast of the launch complex. The W-53 nuclear warhead landed about 100 feet from the launch complex’s entry gate; its safety features operated correctly and prevented any loss of radioactive material. Twenty-one people were injured and one killed by the explosion or during rescue efforts.