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Children, who have come with their families to take part in a monthly religious gathering, keep warm while camped out overnight at Our Lady of the Rock, a church in California's Mojave Desert. Most of the people who attend are Mexicans living in California. At the site, since 1989, people have been gathering on the 13th day of each month, to pray and take part in processions. They also bring cameras to take pictures of the sky with the hope that they will capture an image of the Virgin Mary.