BREAKING! Suspicious Letter to Obama Puts D.C. on Alert & Letter Near Senator Shelby's Office Evacuates Parts Of Capitol Building

April 17 (Bloomberg) -- Bloomberg's chief Washington correspondent Peter Cook reports on the heightened security around Washington D.C. as the Secret Service announces the discovery of a suspicious substance in a letter addressed to President Barack Obama. He speaks on Bloomberg Television's "Market Makers." Bloomberg's Peter Cook reports on a suspicious package at Capitol Hill and the deployment of Capitol Police. He speaks on Bloomberg Television's "Market Makers." (Source: Bloomberg) Bomb Team Deployed to Senator Shelby's Capitol Hill Office