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Birke Haylom breaks U-20 women's mile record; Cory Ann McGee close behind

Watch Ethiopia's Birke Haylom break the U-20 mile record for women with a time of 4:17.13, just ahead of American Cory Ann McGee, who is now the third-fastest American female miler ever.

Birke Haylom breaks U-20 women's mile record; Cory Ann McGee close behind originally appeared on NBC Sports