Clever project to block illegal tunnels

A Palestinian clearing a tunnel of sewage in Rafah, between Egypt and the southern Gaza StripBy FARES AKRAM and DAVID D. KIRKPATRICK  Published: February 20, 2013

For centuries, governments have fought against those trying to tunnel in or out of their installations. Whether it was sappers trying to tunnels under castles to knock down walls, prisoners escaping prison camps or drug smugglers sneaking into the US, there has been a one-upmanship battle between the tunnelers and those detecting them.

The latest battleground has been the tunnels between Egypt and Gaza used to smuggle weapons into this dangerous area. The Egyptians have come up with a simple but effective measure to fight them: Raw Sewage. Simple, but effective.