The National Park Service has been looking at reopening more of the Statue of Liberty to visitors.

According to documents released Friday by a New York congressman,
the park service asked for bids last month to study what it would
take to safely let visitors up to the statue's crown again, for the
first time since 9/11.

The entire island was closed after the attacks. Four years ago,
the statue's base, pedestal and lower observation deck reopened.
But the crown and its interior observation deck are still closed,
because the Park Service says there's no way to evacuate them
safely in an emergency.

Congressman Anthony Weiner, who released the documents, says
keeping the crown closed hurts the city's economy.

The Park Service says several companies have looked at visitor
access since the terror attacks, and all concluded that the area
from the pedestal to the crown doesn't meet safety codes.

The survey that was sent to nearly 800 security firms asks them
to prepare plans to address whether the statue can be updated to
meet those codes.