Instead of Biden telling Russia before the invasion and after that US forces wouldn't engage. Biden should have told them that if Ukraine's defenses doesn't beat back the Russian forces, then the US will consider entering and driving Russia out. In any case, Russia won't get Ukraine.
Then to drive home the point set off a USA firework over Moscow.
![](https://bungalowfrog.com/serve/24/image/ab/2015-07-25_OSWEGO_USA_Carlino.ab.JPG)