This is the famous, or rather infamous, site where mostly US pilots (but others as well) were held as prisoners of war.  It was euphemistically called the Hanoi Hilton.  Notice the blue placard just under the doorway arch.   It says something about not taking pictures!  Of course my Vietnamese is so very poor, . . .

This is MIG-21, flown by the North Vietnamese against American pilots.  This particular one is in Ha Noi at a very interesting war museum.   I think one of the most interersting things about this museum is that it is comprised primarily of artifacts from the first Indochina war--i.e., the war with the French.  I find something about monuments to French failure particularly inspiring.