The NATCA said it has had ongoing discussions with the FAA about improving security, but accused the agency of dragging its feet.

CNN: Union claims security lax at many air control towers

The National Air Traffic Controllers Association (NATCA) is asking for armed guards and better identification cards at all 325 Federal Aviation Administration controlled facilities.

CNN: Union claims security lax at many air control towers

Besides a lack of guards, NATCA said in some cases ID badges aren't being worn, unescorted visitors can access towers and vehicles can drive up to the base of towers.

CNN: Union claims security lax at many air control towers

"It is vitally important that the FAA make extra efforts to guard air traffic control facilities because our national security is at stake, " NATCA President John Carr said in a statement.

CNN: Union claims security lax at many air control towers