Mountain Top Fencing Where there are tunnels for the BorderTransportationSystem there will be a security problem, a person or group can just walk over the top of the mountain and bypass the border security.  This then requires that some sort of fencing and monitoring is used to secure the border at these locations.  The best way to handle it is to NOT have tunnels, but have cuts through the mountainsides and therefore, it becomes very difficult to transverse from one side to the other.   \__T__/  Doing mountain cuts will require that ample drainage is provided as the summer Monsoons can dump up to 3 and 4 inches of rain in an hour or less.  If sensors are needed on the mountain tops, then these should be a mix of active and inactive sensors that are mounted on towers.  The inactive sensors are to confuse those that would try to destroy the sensors by shot or other means.  Index of ...