 We assigned the fire teams the charges that they are designated to build. We watch and observe as the Marines are given the demolitions and then told how to build the charges. Then they do the calculations to see how close to the charges they can get when we go to blow these things. And then we're about to go up there and start blowing these doors in. My name is Gunner Sarnskill, I'm with Combat Assault Company, engineer platoon with 3rd Marine Regiment. We're out here today doing a joint demolition range on Schofield Barracks with the United States Army. We're doing urban breaching. Alright, the point is to gain entry inside of a structure. Alright, so when you're going to gain entry inside of the structure, all we're going to do is we're going to utilize those charges to either blow a hole in the side of the wall, the door or the window. They're going to go up there, typically you do it in a tactical manner, you do it in what they call a stack. So you're going to stack your Marines in a single line with their sappy plates facing the door at a 45 degree offset. So any over pressure or fragmentation doesn't hit the Marines behind you. We're going to monitor them, we're going to go real slow. We're going to make sure their pace is right so they don't get any fragmentation or over pressure. We'll pace them off, make sure everything's done correctly and then we're going to blow those charges.