Good that you begin your explanation with a frank admission of your severe intellectual limitations.
The explosion was conventional. Over the centuries, there have been multiple accidental chemical explosions on U.S. soil that were much bigger.
The DU tank gun ammo being stored at the depot found some way to explode in a nuclear fashion.
Ludicrous! Frankly impossible! You obviously have ZERO understanding of nuclear physics.
NATO fops and/or neocon wankers [...]
Pure speculation on your part.
Regards,
The loss of the USS Mount Hood in WW2 is a good example of the possibilities of conventional explosives.