By Steve Holland, Makini Brice and Andrea Shalal WASHINGTON (Reuters) -U.S. President Joe Biden assailed Russian President Vladimir Putin, barred Russian flights from American airspace and led Democratic and Republican lawmakers in a rare display of unity on Tuesday in a State of the Union speech dominated by Russia’s invasion of Ukraine. “Let each of us if you’re able to stand, stand and send an unmistakable signal to Ukraine and to the world,” Biden urged Democrats and Republicans Lawmakers who are deeply divided over taxes, voting rights and gun safety stood together to applaud Ukraine, man…