WASHINGTON -- As a young Navy swift boat commander in Vietnam, Sen. John Kerry was no stranger to the perils of hot pursuit in combat. He was awarded a Silver Star for beaching his boat after a rocket attack and racing ashore to chase down and kill a Viet Cong fighter armed with a rocket launcher. Nearly 40 years later, as incoming chairman of the Senate Foreign Relations Committee, Kerry favors using hot pursuit against pirates in the waters off Somalia, but urges a cautious approach before U.S officials consider sending American forces to chase them ashore. Kerry plans committee...