navy yard. these are the names we know right now. michael arnold, 59. sylvia frasier, 53. kathy gaarde, age 52 and john roger johnson 73 and frank kohler and kenneth proctor and vishnu pandit, age 61. our hearts go out to all of their families. these people weren't doing anything yesterday but their jobs, going to work just like they did every day. as for the gunman, this is what we know this morning. he was 34 years old. a defense contractor. a former navy reservist and did lead a life full of contradictions. pamela brown is here following that part of the story. good morning. >> good morning. that's right. pictures emerging who this gunman was, aaron alexis, but we don't know how he was able to carry out this shooting and why we have learned he was an employee of a company called the experts. a subcontractor of hewlett-packard that refreshed computer equipment for the navy