It's likely that some Americans assume child marriage happens only in developing nations, where one in three girls are married before 18. But it happens around the world, among people of different faiths, and in secular homes. It happens across the United States, where religion can play a unique role in preserving the practice of child marriage — it's at once a reason some minors are forced to marry early, and also why some lawmakers insist the law must not be changed to end the coercion.