U.S. Ramping Up Major Renewal in Nuclear Arms

It is part of a nationwide wave of atomic revitalization that includes plans for a new generation of weapon carriers. A recent federal study put the collective price tag, over the next three decades, at up to a trillion dollars.

.. This expansion comes under a president who campaigned for “a nuclear-free world” and made disarmament a main goal of American defense policy.

.. Skeptics say that the arsenal is already dependable and that the costly overhauls are aimed less at arms control than at seeking votes and attracting top talent, people who might otherwise gravitate to other fields.

.. In open and classified reports to Congress, Mr. Obama laid out his atomic refurbishment plans, which the Congressional Budget Office now estimateswill cost $355 billion dollars over the next decade. But that is just the start. The price tag will soar after 10 years as missiles, bombers and submarines made in the last century reach the end of their useful lives and replacements are built.

“That’s where all the big money is,” Ashton B. Carter, the former deputy secretary of defense, said last year. “By comparison, everything that we’re doing now is cheap.”