Muslims around the world are gathering for Friday prayers, and in one neighbourhood in the US state of Virginia, the worshippers will enter a building that could hardly be further from a traditional mosque.
At a time when religious differences are sparking conflict in the Middle East and beyond - it is cooperation between two faiths which is allowing this unique programme flourish.
The BBC’s Katty Kay reports on how the Jewish community opened its doors because the area’s mosques could not accommodate all of the growing Muslim population.