Biden proposing 5-year extension of nuke treaty with Russia, says US official Biden proposing 5-year extension of nuke treaty with Russia, says US official arif2021-01-24T00:46:19+00:00 WASHINGTON — The Biden administration is proposing to Russia a five-year extension of the Biden proposing 5-year extension of nuke treaty with Russia, says US officialarif2021-01-24T00:46:19+00:00