Both areas have been closed to new drilling for many years.
A security guard stopped us and tried to explain the area was closed.
The area is still closed and residents are denied access.
The area has been closed to foreign reporters since February.
When these bases were formed the area was closed to the public.
The center remained open while filming took place, although certain areas were closed.
From 1947 until 1989, the whole area was closed to visitors.
The work is being done in stages, so the whole area will not be closed at the same time.
On the morning of April 14, 2008 the entire area was closed off.
To accommodate changes in population from winter to summer, certain areas can be closed.
