 D.C. considers more regulations on moped operators. I'm Kate Ryan. Big strides unveiled in Maryland's Purple Line project. I'm Grace Newton. Stocks are mixed at this hour. The Dow up 33. The Nasdaq down big. So is the S&P 500. And the Nats are once again getting pummeled in New York in a day baseball game. 3 o'clock. This is CBS News on the Hour. Sponsored by O'Reilly Auto Parts.