I can vouch that the very first eyewitness interview i saw was a lady who said that "Homeland security was there in 5 seconds!" Indeed the first footage i saw, had First responder types in bright vests everywhere but soon after they were gone and DHS has not really been mentioned since. Kinda similar to the way Sandy Hook was handled with DHS suspiciously having a "drill" nearby and so responded instantly. If one reads all the corresponding links on infowars theres already quite a few supposed inconsistencies pointed out in the gov\media versions.
Add to it the instant legislation introduced by senator Lautenberg (D-NJ) to require background checks and limits on powder/reloading purchases.
Interesting timing huh?