News Pearl Harbor ‘led to a changed world.’ 80 years later, a fading memory will be honored again. December 7, 2021Claire Thornton, USA TODAYComments Off on Pearl Harbor ‘led to a changed world.’ 80 years later, a fading memory will be honored again. The events at Pearl Harbor on Dec. 7, 1941, launched America's involvement in World War II and changed the course of a nation.