Tourists coming to ground zero to see the Sept. 11 memorial often peer through a fenced-off construction site for a glimpse and ask street vendors when it will be built.

It will be at least two years before the memorial to the 2001 terrorist attacks opens to the public. But in an old camera shop northeast of the World Trade Center site, visitors will be able to watch live video of the construction, record their 9/11 memories and even leave with a souvenir.