Crusaders from the Fourth Crusade broke through Constantinople’s walls and entered the great city.
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Jonas Salk's Polio vaccine tested by Jonas Salk was given final approval by the US Food and Drug Administration.
Project Starshot was announced by Yuri Milner, Stephen Hawking, and Mark Zuckerberg.
The first Space Shuttle mission was launched.
Shapur I became co-emperor of the Sasanian Empire with his father Ardashir I.
Hillary Clinton announced her candidacy for US President.
