The Changsha Rice Riots of 1910 from 15 Minute History at UT Hemispheres
This letter was written by Gandhi to Hitler in an attempt to stop the road to World War II. It is dated July 10, 1939.
The picture below shows Hiroshima before (left) and after (right) the dropping of the atomic bomb in August 1945.
"Russia Halts US-UK Display of WWII Photos" from BBC.com, 11 April 2015