Pioneers: The year's many female firsts include WNBA star Becky Hammon becoming assistant coach of the San Antonio Spurs, gymnast Kacy Catanzaro (shown here) completing the obstacle course on "American Ninja Warrior," Navy Adm. Michele Janine Howard's promotion to four-star admiral and Janet L. Yellen's serving as the first female chair of the Federal Reserve Board. (Associated Press)
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