 Good evening, I'm Sarah Jacobs. Coming up, fireworks light up the D.C. sky on the 4th of July as a massive crowd packs the National Mall. Learning more about what caused that boiled water advisory. WFED Washington. WTOP FM HD2 Washington. W283 DG Sterling. WTOP FM HD2 Braddock Heights. WTOP FM HD2 Manassas. Portions pre-recorded. Federal News Network. It's 10 o'clock.