15 said to be in critical condition at least 10 people lost limbs in these explosions and many more have been scarred for live. again, the fbi has the lead in this investigation and they're asking for anyone with information to call them. their number 1-800-call-fbi the investigation will go on for some time to come. >> if you're there today, the marathon and took video on your cell phone just take a look and see if there is anything unusual. the sfib looking for tips and you never know who might have a tip on camera. rick, thank you very much. >> sure. >> greta: joining us is someone running in the marathon today joining us by phone. where were you when the bomb went off? >> roughly a quarter mile from the finish line where the bombs went off. changing out of my