Atomic Bomb in WWII

I have multiple requests for this topic and found some websites that have amazing amounts of information.
Take a look at:

National Security Archive site with links to primary documents: http://www.gwu.edu/~nsarchiv/NSAEBB/NSAEBB162/index.htm

  

Info from the Truman Library:

http://www.trumanlibrary.org/whistlestop/study_collections/bomb/large/index.php

Yale's Avalon Document Collection:

http://avalon.law.yale.edu/subject_menus/mpmenu.asp

Manhatten Project Interactive History from the US Dept of Energy:

http://www.cfo.doe.gov/me70/manhattan/

Nuclear Files Documents

http://www.nuclearfiles.org/menu/key-issues/nuclear-weapons/history/pre-cold-war/hiroshima-nagasaki/index.htm

I will also pass a list of books on to Mr. Aleckson.  We do have a large collection of resources on this topic - both in the regular collection and in government documents.