I seem to recall reading a year or two ago that there are a lot of them working at nuclear facilities, too and supposedly they couldn't root them out because it would be profiling and questioning their status, which was unacceptable. Oh yeah, far better to subject the entire country to God knows what risks than to p*ss off the illegals.
That may be true. I do know that Los Alamos is once again facing a very embarassing, not to mention critical, loss of nuclear technology. It's the third time this year alone.
What I found particularly disturbing was the promise that someone 'might' lose their job over this. Job hell, put the sons of b------ in prison and throw away the key.