security holes in its computer system. those million miles enough for several first-class trips to asia or up to 20 round-trip domestic flights. and those are some of our top stories on this friday, july 17th. >> announcer: from abc news this is "world news now" with t.j. holmes and reena ninan. we begin this half hour with the shock and grief over that attack in tennessee that left four marines dead. >> the gunman first unleashed a barrage of bullets on a military recruitment center in chattanooga, tennessee, without even getting out of his car. he then drove to a navy and marine training center where he opened fire again. the suspect, 24-year-old muhammad youssef abdulazeez also dead, and three others were wounded. >> he just pulled up and next thing you know he lifted up his arms like this with a big, black gun, and just it was one shot and then it was just endless shots, one after another, just