WASHINGTON (AP) - A new U.S. policy is being unveiled that seeks to narrow the circumstances under which the United States would use nuclear weapons.
The policy still seeks to preserve long-standing assurances of nuclear protection for allies.
It is a delicate balance that the Obama administration will describe in a policy document, called a nuclear posture review, to be released today following a full year of deliberation.
The document reflects President Barack Obama's pledge to move toward a nuclear-free world. It could strengthen U.S. arguments that other countries should either reduce stockpiles of nuclear weapons or forgo developing them.
The review is only the third since the end of the Cold War two decades ago.
The White House also plans to urge Russia to begin talks on adopting first-ever limits on shorter-range nuclear weapons.