 It is 78 degrees in Manassas, 80 already in Frederick, and 81 at Metro Center. Brought to you by Mervis Diamond Importers. Mervis Diamonds make a statement. They say you know quality and value only at Mervis Diamond Importers. Coming up on WTOP, D.C.'s police chief reflects on her first year on the job. More news in 30 seconds. What does going all out at Six Flags sound like? Well, like... and...