An American football player's public protest against police brutality and racial discrimination may have cost him his career.

Colin Kaepernick was the quarterback for the San Francisco 49ers.

Born to a white mother and black father, and raised by white adoptive parents, Kaepernick ignited a growing trend among US pro athletes to "take a knee" during the national anthem at the start of games.

Al Jazeera's Heidi Zhou-Castro reports from New York.

US & Canada, Arts & Culture