Dig My Grave

There is a bill pending to outlaw building or financing a tunnel under the United States border. Here is some information from Senator Feinstein:

"Since 9/11, at least 44 border tunnels have been discovered in the United States, all but one have been on the southern border. These tunnels range in complexity to from simple ‘gopher
holes’ a few feet long at the border, to massive drug-cartel built mega-tunnels."

I read that several times. Comments:
1. The "gopher holes" are presumably dug immediately under the fences. These are not a particular problem. They are unlikely to be dug under stretches of empty desert.
2. The mega-tunnels (for those who don't know) can include small railways. It's disturbing that we have found several, and don't know how many others (obviously) may be out there.
3. One of these tunnels was under the Canadian border. That's really, really dangerous. Because everyone seems to have forgotten about the Canadian border, the longest undefended border in the world. It's dangerous because THAT tunnel was not built to smuggle drugs or immigrants, I presume. Maybe illegal immigration shouldn't be the reason for building fences or scanning the border, eh?