A nuclear plant about 50 miles from the nation's capital is virtually unguarded, according to an investigation by The Daily Caller. The website released a worrisome video today, showing its reporters driving through the front gates and approaching the reactor without any contact with security.

Security Expert: ISIS Could Pay Drug Cartel to Attack U.S. Power Grid

'We Should Be at DEFCON 1': McInerney Warns ISIS Already in U.S.

Report: Jetliners Missing From Libyan Airport, New 9/11 Attack Feared

On another visit, the reporters saw a security vehicle pass by, but the person inside failed to stop or ask questions. The report also highlights that a large truck, like the type used in many terrorist attacks overseas and in Oklahoma City in 1995, drove through the gates without being stopped.

Tucker Carlson, editor of the Daily Caller and co-host of Fox and Friends Weekend, talked to Martha MacCallum this morning about what one of the reporters called "one of the softest targets I have ever seen."

Carlson says he has now been assured that these apparent security flaws at Maryland's Calvert Cliffs Nuclear Power Plant will be fixed. He said the Nuclear Regulatory Commission was notified before the piece was published.

Carlson noted that the reporter, Alex Pappas, was told by an official that "everything is fine" despite the fact that the guard house was unoccupied and padlocked.

Carlson pointed out that the bomb that destroyed the Murrah federal building in Oklahoma City was contained in one truck and damaged an area 16 blocks wide.

"You could really damage, perhaps destroy, that reactor and the whole area surrounding it, including the nation's capital," he said, calling the lack of security "bizarre."

They agreed that the issue of soft targets is a big one right now given the reports that ISIS terrorists have access to American passports.

Watch the interview above and read the full report.

Security Expert: ISIS Could Pay Drug Cartel to Attack U.S. Power Grid

'We Should Be at DEFCON 1': McInerney Warns ISIS Already in U.S.

Report: Jetliners Missing From Libyan Airport, New 9/11 Attack Feared