Soldiers fight for desert cross By Bill Hess Published/Last Modified on Sunday SIERRA VISTA — “On a hill far away stood an old rugged cross,” goes the opening of an old hymn. But for Sgt. Zachary Thomson, a cross on a hill in California’s Mojave Desert has a different meaning. It’s not a religious symbol to the 26-year-old Sierra Vista resident, who is serving with a Military Police unit at Fort Polk, La. It’s a war memorial, put up in 1934 by veterans of World War I, to honor Americans who died in that conflict. But now the memorial is...