The third group, which acted as a second type of control, were released without any marking.

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The U.S. had been scheduled to hold a ceremony marking the transfer of control two weeks ago, during Hagel's first visit to Afghanistan as defense secretary.

NPR: US, Afghanistan OK Detention Center Transfer

Still, the FDA decision moving the pill from behind the counter to drugstore shelves reflected a societal shift in the long battle over women's reproductive rights, marking a major milestone for those who believe all forms of birth control should be easy to buy.

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