Bahrain’s Salwa Eid Naser failed to make herself available for doping tests, leading to action by the Athletics Integrity Unit.
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Banned sprinter Sha'Carri Richardson left off Olympic team - Los Angeles Times
Salwa Eid Naser, world 400m champion, to miss Olympics with ban - NBC Sports
Suspension of Sha'Carri Richardson reignites Olympic banned substance debate
Iraqi sprinter Dana Hussein temporarily suspended from Tokyo 2020 after failing drug test
Runner Mary Cain Says Nike Coach Forced Her to Lose Weight
2016 Rio Olympics -- Shaunae Miller from Bahamas wins women's 400m race; American Allyson Felix takes silver - ESPN
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100 days to the Tokyo Olympics: Twenty-five US athletes to watch, Tokyo Olympic Games 2020
Jamaican sprinter Elaine Thompson-Herah claims double gold - The Boston Globe
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American sprinter Sha'Carri Richardson fails drug test, could miss Olympics, Sports
What Qualifies a Woman to Compete as a Woman? An Ugly Fight Resumes - The New York Times