Vipers!

Big news today is a lot of movement on F-16s for Ukraine:

Operators of the F-16 Viper multi-role fighter jet, including the Netherlands, have expressed a willingness to transfer their aircraft to Ukraine. A leaked report from the U.S. Air Force suggests that pilot training for the F-16 could be completed in as little as four months, although there are likely some questions about the effectiveness of the pilots trained. 

This puts things squarely in the court of the Biden administration. Because of the complex nature of the arms trade, Washington has a veto over the transfer of essentially any Viper in the world. Now, in apparent response to statements of interest from several operators, the Biden administration appears to be making clear that it will not veto the transfer of F-16s to Ukraine. More important, the Biden administration has also agreed to facilitate joint training of Ukrainian pilots on the F-16. 

This all makes it extremely probable that F-16s will soon fly into combat over Ukraine.