Commander Mark Bishop is deliberately low-key: 'I'm in the Navy.' But commanding the ballistic missile submarine USS Nevada, keeping her crew trained and alert during ninety-day submerged patrols, and being prepared to launch weapons on valid presidential orders, carries a burden of command like few other jobs in the military. Mark Bishop is a man who accepts that responsibility, and handles it well. And at a time when tensions are escalating around the Pacific Rim, the Navy is glad to have him.