Well, the answer to the West, TX explosion might be here:
tinyurl.com

WEST — The fertilizer plant that exploded Wednesday had at least 540,000 pounds of potentially dangerous ammonium nitrate in a storage building, a 2012 company filing with the state health department shows.

That’s more than 100 times the weight of the ammonium nitrate and fuel oil mix that Oklahoma City bomber Timothy McVeigh used to destroy the Murrah Federal Building 18 years ago Friday.

The size of the explosive fertilizer stockpile on the property of West Fertilizer Co. and Adair Grain became clear Friday as an army of federal, state and local investigators picked through acres of shredded metal and the debris from blasted homes and schools close to the site.

Senseless, stupid, ignorant…too many words to describe it. Anyway, hello Lizards!