change it s aggressive and dangerous behavior. and i think the sailor s appreciate that, that we re looking for any way to avoid conflict and to keep deterrence working. reporter: the potential for nuclear conflict in korea isn t the only cause for concern for the navy s seventh fleet. this summer, 17 sailors were killed in what the navy admits were preventable collisions. on board the uss fitzgerald and mccain. those investigations are ongoing. in addition, reports of deteriorating moral and a severe lack of leadership on the uss shiloh led the navy to replace the ship s captain and put in new measures to better gauge the mood of it s sailors. every one of those ships belongs to this fleet. when you heard about the mccain and the fitzgerald, how did you feel? well being a damage control manager, it gave us the reality feel.