The man in charge of the National Nuclear Security Administration's defense programs outlined for lawmakers yesterday the agency's latest plan for restructuring the country's nuclear weapons complex to make it smaller but more efficient. "By 2030, the vision I set forth is a world where a smaller, safer, more secure [nuclear] stockpile, with assured reliability over the long term, is backed by an industrial and design capability to respond to changing technical, geopolitical or military needs," Tom D'Agostino said in...