All federal building require this. Nothing new.
Nowadays? Obammie has the DOJ, the IRS and thousands of of other agencies armed to the teeth with millions of rounds of ammo, weapons and assault vehicles ready willing and able to put down any violent and rebellious actions some blue-haired Tea Party pensioner might start at the Social Security office. We see this as a normal daily occurance, and we think nothing of it.
Doesn't that just comfort your so? Ya can just sleep better at night know that, right?
/s