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The Impossible Explosion: How 47 Sailors Were Silenced on Iowa

The Impossible Explosion: How 47 Sailors Were Silenced on Iowa

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The Impossible Explosion: How 47 Sailors Were Silenced on Iowa

A fireball moving two thousand feet per second tore through Turret Two on April 19, 1989, killing forty-seven men and releasing cyanide gas from burning polyurethane-yet the powder canisters were stamped "Do Not Use with 2,700-pound projectiles." How did outdated propellant, unauthorized experiments, and ignored warnings lead to a catastrophe that some in the Navy then covered up?

In this episode, we lay out the sequence of events on the USS Iowa, the ship's condition, the people on board, and the decisions that preceded the blast to ask: who made the call that put those sailors inside a gun that should never have fired?

Person: Gunner's Mate Second Class Clayton Hartwig, age 24
Date: April 19, 1989
Location: Turret Two, USS Iowa
Event: Center gun fired using D-846 propellant printed "Do Not Use with 2,700-pound projectiles"
Status: 47 men killed; fireball temperature estimated 2,500-3,000°F

- The Iowa was recommissioned in April 1984 one year ahead of schedule without the Board of Inspection and Survey exam.
- Hydraulic fluid leaked at 55 gallons per turret per week according to a 1986 inspection.
- Captain Fred Moosally canceled a $1,000,000 repair package addressing 75 documented deficiencies one week after taking command on May 23, 1988.
- The D-846 propellant was manufactured between 1943 and 1945 and stamped with a warning about 2,700-pound projectiles.
- The fireball moved at 2,000 feet per second and produced internal pressures of 4,000 pounds per square inch.

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