It's part of the script. Some time during this week, one last major, very expensive, tariff-funded decapitation attack will take place in Russia. I think Medvedev might be the primary target since his Tweets bother Trump so. Trump, thinking he is so slick, will deny any knowledge of the attack. Soon after he starts waving his hands like an idiot, humanity comes to an end.
Then the alien ship lands and starts a better world.