The status quo is that they have access credentials, which presumably come with some sort of vetting. So a "foreign agent" showing up and impersonating a reporter is unlikely.
I've visited the White House a couple of times and even setting foot on the complex as a visitor requires a background check, I assume the Pentagon functions similarly.
You honestly think a foreign agent impersonating a reporter is any more unlikely than a foreign agent--or one working on their behalf--isn't likely to be working within the government?
I've visited the White House a couple of times and even setting foot on the complex as a visitor requires a background check, I assume the Pentagon functions similarly.