"How many mosques constitute an oversaturation in unincorporated DuPage County, according to the Zoning Board of Appeals?" asked Ahmed Rehab, director of the Council on American-Islamic Relations, at a news conference. "The answer would be one. One would be one too many apparently, and that's very disconcerting to us."

In tough economic times most neighborhoods would welcome development. But in suburban Willowbrook, they’re waving it off for an unusual reason: religious oversaturation.