The tricky part was hiding the dirt that came out as they tunneled under the wall.
“Are you familiar with the tunnel under the Berlin wall?
The tricky part was hiding the dirt that came out as they tunneled under the wall. “
Can’t say that I’m familiar, but you have a good point. Also, with the investment needed for a tunnel that humans can use, they’re not going to waste their money and risk being caught for human smuggling, when drugs bring them 1000X the money for the same effort.