think what you re kind of giving a head nod to is there s a lot of nothing you re look at for a greatlo expanse. 150 miles wide you were saying, some two miles deep. reporter: so the dmz, the demilitarized zone, is this band of territory set up after the korean war to prevent a resumption of hostilities. 2 1/2 miles wide, 160 excuse me. 160 miles across. and 2 1/2 miles deep. and it is an area that are multiple structures,th multiple guard towers.s, there are an estimated 1 million landmines still in the area. lots and lots of barbed wire. on one side, the side where i am right tnow, you have 30,000 roughly american troops and the south korean army. on the other side you have the north u korean army. and then critically artillery pieces. thousands if not tens of thousands of north thkorean