(Reuters) - The United States is not considering returning to Ukraine the nuclear weapons it gave up after the Soviet Union collapsed, White House national security adviser Jake Sullivan said on ...

The United States is not considering returning to Ukraine the nuclear weapons it gave up after the Soviet Union collapsed, White House national security adviser Jake Sullivan said Sunday.

T he United States is not considering returning to Ukraine the nuclear weapons the country previously agreed to give up under ...

Supreme Leader Ayatollah Ali Khamenei rejected a call by US President Donald Trump for Iran's "unconditional surrender" as ...

The last nuclear age was defined by two superpowers — the United States and the ... them both to pursue more weapons, throwing any limits into doubt. But this is not just a three-body problem ...

Second, policymakers will hear a rising chorus claiming that the U.S. does not ... nuclear domains. Though some experts focus heavily on building more nuclear weapons as the primary answer, many ...