You may want to use some of the following terms when you are searching these resources:
Adolph Hitler Atomic Bomb on Hiroshima
Auschwitz-Birkenau Bombing of Pearl Harbor
Bergen-Belsen Executive Order 9066
D-Day - Invasion of Normanday Hiroshima
Final Solution J. Robert Oppenheimer
Kristallnacht - Night of the broken glass Japanese American
Miep Gies Internment Camps
Nazi Party Manhattan Project
Non-Jewish victims of the Holocaust Nagasaki
Nuremberg Trials Warsaw Ghetto uprising
Oskar Schindler
Sweet Search is a great alternative to Google. It will search for sites that are appropriate for assignments and results will be annotated. This means that there will be notes telling a little bit about the Website; so you will know something about the site to help you decide if it will be useful.