This photo shows a long exposure of the early instants of the Trinity nuclear test, which was conducted as part of the Manhattan Project at White Sands Proving Ground in New Mexico. It happened today in 1945 and was the first nuclear explosion in human history.
1901—McKinley Fatally Shot
Polish-born anarchist Leon Czolgosz shoots and fatally wounds U.S. President William McKinley at the Pan-American Exposition in Buffalo, New York. McKinley dies September 12, and Czolgosz is later executed.