Former President Barack Obama joined a group of notable athletes and activists in tipping his cap to honor the 100-year anniversary of the founding of baseball's Negro Leagues.
The Tip Your Cap campaign launched online Monday with photos and videos from sports legends Hank Aaron, Derek Jeter, Michael Jordan, and the family of Jackie Robinson. Former U.S. presidents Bill Clinton, George W. Bush and Jimmy Carter also participated.
The tributes honored some of the Negro Leagues' notable stars including Robinson, Satchel Paige, Byron Johnson, Willie Mays, Hank Aaron, and Ernie Banks. Robinson started his career with the Kansas City Monarchs and went on to break the color barrier in the major leagues with the Brooklyn Dodgers in 1947.