 A mass casualty is when our STP is so overwhelmed, we have more going on than the resources that we have. So we have a lot of capable providers and corpsmen and we have all these mass casualties and we have to decide how we are going to take care of them and save every life possible. So I'd say like the most difficult part is that we are overwhelmed and we have the skill and we don't have enough resources so we overwhelm our assets and it kind of pushes us to the limit. Working with the JD STF has been difficult but it's also been really exhilarating just because we're getting to share medicine and medicine is kind of its own language to the point where there is a huge language barrier there but when it comes to medicine it's kind of universal. Like we just knew what to do, we knew our bed roles, I would hand them things and they would just know what to do with what I was handing them or what we were trying to accomplish. If I started doing something they would take over right away because they just knew how to work.