It's the ultimate sanction in a Formula 1 race: the black flag results in instant disqualification. Here's when the flag can ...

The 10K started under a yellow conditions, but officials upgraded it to a red alert just after 10 a.m. Around 10:35 a.m., the rest of the race was officially canceled with a black flag alert issued.

Sometimes referred to as the UNIA flag, Afro-American flag, Black Liberation flag ... as a reaction against the racist song ...