i am ainsley earhardt. >> i am heather childers. it is half past the top of the hour. the fbi releasing new chilling surveillance video from inside the navy yard massacre that left 13 people dead including the gunman. you see aaron alexis armed with a sawed off shot gun peeking around corners looking for someone to ambush. up next quickly moving down the stairs into another hallway. he sees some people and he ducks right there behind a wall. new insight this morning as well. aft as to his motive, the fbi found a bizarre note saying radio waves drove alexis to kill. >> this man accused of opening fire in a light picfixture comp in garden city, new york. he is 63-year-old sang ho kem. he killed a co-worker and