New US policy will state the main role of nuclear weapons is to deter a nuclear attack

US unveiling new, more restrictive nuclear policy

WASHINGTON — The Obama administration is unveiling a new nuclear weapons policy that seeks to narrow the circumstances under which the United States would use such weapons while preserving long-standing assurances of nuclear protection for allies, U.S. officials said.
It is a delicate balance that the administration will describe in [..] Read the original article: here.