At issue is the Establishment Clause of the U.S. Constitution, which bars the government from favoring any one religion, as it applies to a lone white metal Latin cross in the Mojave National Preserve in southern California between Los Angeles and Las Vegas. In 2004, the 9th U.S. Circuit Court of Appeals ruled that a cross on a prominent rock on public land was unconstitutional, prompting Congress to pass a law allowing a trade so its immediate area would become private land. People have been putting crosses in the spot since the 1930s, most recently with one man drilling a...