Ground Zero Memorial is Not Open to the public Yet. They are only allowing so many people visit each day. You must have a Ticket , These tickets are Name/Time specific. althought they are free , they are Booked thru Oct 31, 2011 , My Wife is a WTC Tower 1 Survivor and our Tickets are Good for Oct 31 6 PM entry. You can see the Plaza from Street Level but that is about as close as you can get. Good Luck I think your Husbands Service as a Deputy Fire Chief should Entitle Him to Unlimited access But The Good People of NY Elected Bloomberg and Not Me as Mayor. Perhaps if you Visit the Firehouse down there , They may be able to accomodate you in some way Hope this Helps