before i do any projects on on my own.st at angie's list, you'll find reviews written by people just like you. i love my contractor, and i am so thankful to angie's list for bringing us together. angie's list -- reviews you can trust. ...and we inspected his brakes for free. -free is good. -free is very good. [ male announcer ] now get 50% off brake pads and shoes at meineke. welcome back here in boston. i'm chris cuomo. we're tracking two breaking news stories now in addition to the developments in the investigations here of what happened at the marathon. first, we're going to go to allisison kosik at the new york stock exchange. the headline is the stock market tanks and recovers on the basis of a tweet. i know it sounds absurd, alison,