[Mariner]

TWO walls, separated by a no-mans land of 40 ft is what is called for.

Each wall 20ft high, sensors throughout the nomans land in the middle.

Helicopter and trucks respond to all breeches. Never more than 15mins away.

Should riots develop on the southern side, allow them to end of their own energies. Should a concerted effort be launched to breech the wall, up-to deadly force should be used to ASCERTAIN the wall stands. IT should be known for 1000 years that no man ever crossed it.

[nbhunt]

and with voltage on the top layers....