1918 – GM buys Chevrolet
http://www.history.com/this-day-in-history/gm-buys-chevrolet
1933 – Loch Ness Monster sighted
http://www.history.com/this-day-in-history/loch-ness-monster-sighted
1957 – Joseph McCarthy dies
http://www.history.com/this-day-in-history/joseph-mccarthy-dies
2001 – George W. Bush forms commission on Social Security
http://www.history.com/this-day-in-history/george-w-bush-forms-commission-on-social-security
2008 – Iron Man released
http://www.history.com/this-day-in-history/iron-man-released
2011 – Osama bin Laden killed by U.S. forces
http://www.history.com/this-day-in-history/osama-bin-laden-killed-by-u-s-forces