Johan Blank

Five to six million strong, Muslims in America already outnumber Presbyterians, Episcopalians, and Mormons, and they are more numerous than Quakers, Unitarians, Seventh-day Adventists, Mennonites, Jehovah's Witnesses, and Christian Scientists, combined. Many demographers say Islam has overtaken Judaism as the country's second-most commonly practiced religion; others say it is in the passing lane.