OK, so here are some ideas for the photographs
Causes:
Try finding some images of propaganda posters and explain the impact they had on the Jewish community. Then maybe get a picture of Mein Kampf and explain the ideas Hitler was trying to portray in it
Main Events:
Here you could get a picture of a Jewish identity card and explain how the Nazid used them. You could also get a picture of a concentration camp and talk about the horrors that occurred in them.
Consequences:
Talk about the memorials dedicated to the fallen Jews in the Holocaust, for example Yad Vasheem. You could also talk about the creation of the state of Israel by the UN after the Holocaust.
To answer the "call to action" talk about the "UN Convention on Genocide" document (search that up) and how it helps to prevent genocides. Add some personal opinion in this section
Good Luck
A Joseph Stalin is what I think
It don't think it ended the war. It was however the reason that America chose to join the second world war. Before that America was hesitant to involve itself in 'Europe's issues' and only participated by lending money to some countries involved in the war.
After the Japanese bombed Pearl Harbour the US took it as a person offence and direct attack against American, and joined the second world war alongside the allies (England, France, etc..). Many say that Americas involvement was a big component to the Allies winning the war.
The bombing of Hiroshima and Nagasaki in Japan were however the bombings that truly ended the second world war. This was done by the allies as the Japanese refused to surrender.
