Russia's new nuclear weapons - real threat or Putin bluster?

Russian President Putin flaunted new nuclear weapons, including the Burevestnik and Poseidon, calling them unmatched and unlike anything in the world. These second-strike weapons have ambiguous military value, with experts questioning their viability. Putin's announcements come amidst cooling US-Russia relations, possibly aimed at vying for Trump's attention. The US has responded with plans to resume nuclear weapons testing in response to Russia's tests.