NEW YORK -- The number of Americans who don't affiliate with a particular religion has grown to 56 million in recent years, making the faith group researchers call "nones" the second-largest in total numbers behind evangelicals, according to a Pew Research Center study released Tuesday. Christianity is still the dominant faith by far in the U.S.; 7 in 10 Americans identify with the tradition. However, the ranks of Christians have declined as the segment of people with no religion has grown, the survey says.
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