I've long ranted about the futility of restricting explosive materials. Most of the time I'm a little circumspect on the details but after this massive explosion some news sources aren't so circumspect:

Sugar dust is just one of a variety of forms of dust that can, under the right circumstances, combust and cause an explosion.

Explosions are not uncommon in places like grain silos, but have been known to happen in sugar factories in the U.S. and abroad, much like the one in Georgia Thursday.

The dust itself can be created in a variety of ways during the refining process.

Anything from sparks from machinery to a lit cigarette could have ignited the blaze.

The dust also has to have a certain concentration to support combustion fast enough to maintain the explosion.

Those are 100 foot high silos in the picture below.

Lets see them restrict access to sugar! It's for the children...