As you may have heard, Discovery Channel’s Shark Week returns on August 1 for one glorious, ferocious and toothy week.  We here in Silver Spring have happily welcomed back Chompie — the official mascot of Shark Week — to our headquarters. For those of you in the D.C. area, Discovery Channel has partnered with Express for a special Shark Week Photo Contest. Just take a photo of Chompie, come up…