Jackie Robinson broke baseball's color barrier April 15, 1947
Riding Freedom: 10 Milestones in U.S. Civil Rights History
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Opening Day, Book by Jonathan Eig, Official Publisher Page
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MLB honors Jackie Robinson with ballpark tributes - Newsday
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Jackie Robinson's complicated — and important — legacy
Jackie Robinson breaks color barrier in first game against Boston Braves (April 15, 1947)
Majors celebrate 75th anniversary of Jackie Robinson's debut