SAN DIEGO -- For 20 years, many of the illegal immigrants drawn by jobs in tomato fields have worshipped at an outdoor church, a concrete altar in a canyon where they slept under the shelter of plywood and plastic tarps and bathed in a stream. Today, however, McGonigle Canyon is overshadowed by multimillion-dollar homes, and police and landowners want the eyesores gone. The squatters and their tree-covered place of worship, which the Roman Catholic church installed in the 1980s, are being expelled in one of the latest skirmishes in the nation's battle over illegal immigration and homeless squatters' camps. "We're...