Defensive structures

LI : To learn defensive structures
On Tuesday LS1 had another speacial guest.He name was Mr Ching and he looked ather bombs and other things.He told us the defensive structures He told us the things that are used to make a good base.They dont use metal as it costs alot,They use rocks as it is easy to make and does not cost alot.They do ones that have a bit of metal in them.They use miniguns and other things to shot down planes and missles.He also told us about dumb bombs,It was dumb beacause it only went the way you shot it.The guilded warhead used things to guild it hint it name.We then got into groups of five and went to make this.