In fact, this was accepted as the most accurate measurement of the speed of light for the next forty years, at which point Michelson measured it again. The next lecture is on the Michelson-Morley experiment to detect the aether.
The United States declared war on Germany on April 6, 1917. There was two major reasons. First off, the German U-Boats sank 3 passenger ships carrying US civilians and citizens.
1941: Germany and Italy declare war on US Germany and Italy have announced they are at war with the United States. America immediately responded by declaring war on the two Axis powers. Three days ago, US President Franklin Roosevelt announced America was at war with Japan, the third Axis power, following the surprise attack on its naval base at Pearl Harbor.