“Even though the Tsarnaev brothers made a violent dash from police, allegedly tossing homemade bombs as they fled, police told ABC News they so far have recovered only a single, semi-automatic handgun from the two men now accused of carrying off the Boston Marathon bombing . . . Law enforcement sources told ABC News the gun recovered from the scene of the Tsarnaev brothers’ shoot out with police was a Ruger 9 mm semi-automatic handgun. Sources said the gun is in the custody of the Massachusetts State Police lab and that the serial number on the firearm was obliterated.” The...