I believe there is already legislation (funding) to do this, they just need to do it.
You are correct: The Secure Fence Act of 2006.
https://en.wikipedia.org/wiki/Secure_Fence_Act_of_2006
“I believe there is already legislation (funding) to do this, they just need to do it.”
The Secure Fence Act of 2007 was passed, but the traitors in congress defunded it.
Supposedly Clinton was supposed to have it taken care of it! There was money allocated but it never got done! I will look for the story I saw on it and post it here!