that left four americans dead are taking action. the house oversight commission is launching a new investigation and demanding that top security officials appear. peter doocy has the latest. >> reporter: shannon, the hearing you are talking about, noon wednesday, is billed as a look into the security failures of benghazi. among the witnesses will be lieutenant colonel andrew wood, the head security official at the u.s. consulate in benghazi, the leader of a 16-man special forces security team, a team that was instructed to leave libya in august, weeks before the deadly september 11 raid that killed ambassador chris stichs, information specialist sean smith and glen dohertyy and tyrone woods. andrew wood is a green beret with the utah army national guard. he told cbs, it is unbelievable to him that the state department decreased security in libya when they did because he showed them