Even at ski resorts, wartime brings hardship. On the slopes of Mammoth Mountain and Alpine Meadows, high along California's Sierra Nevada range, resort operators have grown accustomed to using five leased Army howitzers to blast loose dangerous drifts of snow packed high on mountainsides. "They work really well for avalanche control work," said Pam Murphy, senior vice president for Mammoth Mountain ski resort. But the military wants the big guns back. It needs them for troops fighting in Afghanistan and Iraq. Army officials came knocking for the artillery cannons a few days ago, saying they had no choice but to...