Saw that, and no interior shots of the Iowa. My only guess on why they would have an exterior shot and no interior shots is that they didn't actually get inside.
I would presume that the Iowa would be locked up fairly tightly because I don't think it had been de-militarized (code for rendered incapable of warfighting) at the time.
EDIT: I take it back, Wikipedia says she was decommissioned again in 2006, and donated to the museum duty in 2011.