I realize this is way off-topic of the usual fare for WUWT, but I’d be remiss in my duty as a patriot and an American if I didn’t at least pass it on so that it will get wide distribution. One of my Facebook friends is a police officer who I’ve learned to listen to. He passes this on to me, and I’m passing it on to you as a public service. Take caution, be aware, and don’t let these extremists ruin your 4th of July holiday.