Just read and learn about a former Navy SEAL by the name of Richard Marcinko. He founded the SEALs.
He became the leader of an elite group that tested Navy security. He and his group boarded nuclear subs, Air Force One, and was able to get the launch codes for nuclear weapons. Granted, they were badasses to the extreme, but they showed that it's possible to bypass just about any security.
https://en.wikipedia.org/wiki/Richard_Marcinko
Isn't that the guy who went to prison for fraud?