The accounting issue seems credible to me. The only question is how much a network of a hundred DUMBs with tunnels hundreds of miles long would cost. In NYC, digging a mile of subway tunnel costs $1 billion (since NYC is corrupt and uses union contractors that charge $120/hour). So let's assume the military can do it at 1% of the cost ($10 million/mile), similar to Elon Musk's tunnel boring costs. Now let's assume the military has top secret technology that can drill them at 1/10 of that, or $1 million/mile. It actually sounds possible to dig 10,000 miles of tunnels for just $10 billion.

But how are DUMBs connected to child trafficking? Is it just complete speculation with no proof?

I have played the video game "F.E.A.R. 2", and in the game, there was a huge underground military complex underneath the high school, where they performed medical experiments on the kids and researched super soldier genetics. So I understand what you mean.

But how are DUMBs connected to child trafficking? Is it just complete speculation with no proof?