A significant moment in sports history occurred nearly a decade ago. Former quarterback Colin Kaepernick sparked a wave of athlete activism. His actions during a preseason game are well-documented.

Kaepernick's protest started with him remaining seated before a game. Later, he took a knee during the national anthem.

Further details about this pivotal moment and its impact on sports are available through a CNN Original Series, which explores major cultural shifts in sports over the past six decades.