 Good morning, I'm Kyle Cooper. I'm Michelle Bash. We have everything you need to know for this July 4th, but ahead of that, we want to let you know a lot of people are being affected this morning by a boil water advisory in effect for D.C. and Arlington. It comes as thousands are expected to head downtown for the big 4th of July celebration. WTOP's Neil Augenstein has what's behind the advisory and what you need to know.