The Navy has an "imperative" to pursue unmanned underwater vehicle technology to address numerous challenges and shortfalls the service will face in the coming decades, according to the director of naval reactors. Speaking Oct. 21 at the annual Naval Submarine League symposium in Falls Church, VA, Adm. Frank Caldwell said the Navy is at a fork in the road in regard to UUV technologies. "I think we have an imperative now to transform undersea warfare by exploiting the use of...