In france are investigating an attack by an armed gunman aboard a parisbound train. It could have been a massacre if not for the lifesaving efforts of three americans, all with ties to northern california. One from pittsburgh, one from sacramento and the third from oregon w he have the latest. In this dramatic exclusive video obtained by cnn you see you the gunman with his weapon nearby and injured while taking him down. Potential terror attack happened on a train traveling from amsterdam to paris. According to reports, two u. S. Servicemen, Alek Skarlatos and spencer stone, both with sacramento ties, heard the loading of a gun in a restroom and saw the man come out with the weapon. He came out shirtless with a rifle flung over his shoulder. He sprang into action and wrestled him to the ground. Their mothers relieved. If they hadnt stepped up, there could have been a lot of deaths. We are very proud of them. Anthony sadler was the third man who helped thwart the attack. He yelled get h