felgt the impact of this. they ll talk about the burn, the flash effects and also just this chemical, itself. one of the people, i think, they said they saw guards wearing respirators. that would not surprise me because the air in that area is probably going to quickly become of concern when you have these sorts of chemicals. . so we ve seen these types of explosions in the past. those are pretty standard protocols. frankly, all the blast injuries that we ve been talking about this week with regard to what s happening in boston, those same sorts of injuries, you have to be concerned about here, as well. obviously, fertilizer is used in exploezive devices. you can understand why it would be so flammable. yeah, we talked about ammonia nitrate and its primary use as a fertilizer. fertilizer plants are always of concern.