I am glad to tell you
it is one of two left in the world
this is a Martin Mars
the photo is of the one that should go to Pensacola Florida air museum
http://www.navalaviationmuseum.org
it has a wing span that is wider than the 747
it was built in the late 30's and was commissioned to flyer troops later on to Korea
7 were built 5 flew and 2 remain
here is a link to the owners site
they were converted to water bombers
http://www.martinmars.com
my brother in law flew these plane for 30 plus years as water bombers. He retired as chief pilot a few years ago
I have not flown in them but that been able to go through both of the planes stem to stern top to bottom
I will post some photos tonight