After Israel built the 30ft concrete wall on the west bank side of the border it has been reported that infiltration and sniper fire incidents were reduced by 99% . Why should nâ€™t we do the same along PAK border? It is no longer the case we have to think twice before spending a large amount of money on such activities. In all probability it would more or less cost the same as building a metro in a small city would nâ€™t it? Cement technology it seems to have improved recently, I am told now a days cement setting time and water required can be reduced by 50%. inter-lockable concrete slabs should do the trick,15 inch thick reinforced concrete slabs should do the job would nâ€™t it? In case of damage just replace the damaged set of blocks, Infact if they are damaged from other side we can have "concrete" proof of firing and shelling from other side. I do not have too much details regarding the terrain but a 30-35ft wall would reduce the gunfire issues and border crossing issues to an extent. Only issue remains will be with higher terrain over looking the wall and mortar fire. In my opinion there is nothing more defensive than building a wall.would nâ€™t it be worth the peace of mind?