Utter chaos. it started over add that and i believe and then jump over. i back and ran up the health. Catherine place and lanes remain closed tonight. This is the main highway from Southern California to vegas. California has secured aid from catherine were learning more about the man who killed four marines in two years ago he worked at a Nuclear Plant for ten days. Before that he graduated with a degree in engineering. But friends Say Something must have changed in Mohammad Abdula zeezs life that motivated him to kill. Now investigators are looking at travel records social media accounts and computers to see if there are any clues. Mary moloney reports. Reporter the unmistakable sound of gunfire shatters the silence on a tennessee street. But its not one shot its many indicative of battle. By the end of this day a man killed four marines and wounded three people. Police shot and killed the shooter. Investigators believe Mohammad Youssuf abdulazeez planned to kill. The fbi says he wor