Shalane Flanagan celebrates her historic New York City Marathon victory on Sunday.

Shalane Flanagan celebrates her historic New York City Marathon victory on Sunday.

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American Woman Wins NYC Marathon for 1st Time in 40 Years

It's been a long time running -- four decades to be exact -- since an American woman broke the finish line tape at the New York City Marathon, but Olympic medalist Shalane Flanagan did just that on Sunday.