walter was water was seeping in. a lighting system. see what they were doing. a ventilation system no gasses that could overcome anyone there. they had a track along the bottom of so it they could transport out on some sort of cart or motorcycle. not clear what they were doing. what we do know in the end this thing was a mile long. and over that distance it could have taken a year to build easily. and yet, one of the most wanted drug dealers in the world was able to walk out there in ten minutes or less. >> tom, we have covered drug tunnels from mexico to the u.s. i've been inside of them. we heard of new technology to help find the tunnels,000. could that have helped here? >> you stood down there, you wonder how could they not hear this going on? i talked to a geeophysicistgeophysicist miter corporation, contracting with the government to develop better system. she told me it is just not that