[Navy Patriot]

I think CBS just picked it for convenience to construct the map for air, as it approximates the center of the building area and it's nice and round.

I'm goin' to bed.

[Pikachu_Dad]

EPA Explosion Hazard from Ammonium Nitrate
http://www.epa.gov/osweroe1/docs/chem/ammonitr.pdf

“Ammonium nitrate can be exploded under certain conditions. These must include added energy (heat, shock), especially under conditions of confinement or presence of contaminants. Although ammonium nitrate generally is used safely and normally is stable and unlikely to explode accidentally, accidental explosions of ammonium nitrate have
resulted in loss of lives and destruction of property. These accidents rarely occur, but when they do, they have high impacts. Many of the safe handling procedures were developed after learning from these accidents.”