Throughout American history, there have been several historical events that stand out, in particular: World War 2, the assassination of President John F. Kennedy, the attack on Pearl Harbor and the subsequent dropping of the atomic bombs on Nagasaki and Hiroshima, Japan, just to name a few. All of these events have been preserved in various newspapers around the country, images of which can now be found scanned online.
Archives has a collection of nearly 120 million newspaper images for members to browse through, where one can find more detailed documentation of many of America's prominent historical events. You can read more about some of these events on Archives.