
| Henry Clay, 'The Great Compromiser' | |
| Francis P. Blair, helped found the Republican Party. | |
| Lionel Hampton, orchestra leader and vibraphone improvisor | |
| 4th Crusade sacks Constantinople | |
| Fort Sumter, S. C., shelled by Confederacy, starts Civil War. | |
| British annex Transvaal, in South Africa | |
| Army transfers Yerba Buena Island to Navy. | |
| Moffatt Field (Naval Air Station) is commissioned. | |
| First US law requiring medical tests for marriage licenses, NY | |
| Salk polio vaccine safe and effective; four billion dimes marched | |
| Cosmonaut Yuri Alexeyevich Gagarin becomes first man in orbit. | |
| Maiden voyage Space Transit System-space shuttle Columbia. | |
By Scott Labrecque version 9.4.0.0