President Joe Biden has approved revisions to a classified nuclear strategic document that redirects Washington’s deterrent strategy to focus on China’s nuclear arsenal expansion for the first time, according to a report. Updates to the strategic document, titled “Nuclear Employment Guidance,” were approved by Biden in March. The New York Times reported on Tuesday that the document is updated roughly every four years and is highly classified. No electronic copies of it exist, only a few hard copies that are distributed to national security and Pentagon officials, the Times said….