Fortunately that's not true (yet). It's vitually impossible to get a non-citizen aboard, or even in the controlled nuclear area around the drydocks.
I've had to get contractors in the CNA many times and is not easy to go through the process. I had one German contractor who showed up. He was told he couldn't go in. He couldn't understand because "vee are such goot allies."
“It’s vitually impossible to get a non-citizen aboard, or even in the controlled nuclear area around the drydocks.”
All it takes is a US “delivery” by a pregnant foreign national. (A Chinese practice for at least 30 years).