Poland finally offers its MiG-29s to the United States 

Many official U.S. sources had suggested that Poland was going to offer MiG-29s to the Ukrainian Air Force in exchange for U.S. fighter jets. These announcements had been refuted very quickly by a tweet from the Polish Prime Minister's account (article available here).

However, yesterday the Polish Foreign Ministry publicly announced that Poland was ready to immediately deliver its entire fleet of MiG-29s (23 aircraft) to the United States free of charge by sending them to the U.S. base in Ramstein, Germany. The Polish government says its Air Force will receive second-hand but equally capable U.S. fighter jets in return.

Finally, Poland also wants other NATO member countries with similar aircraft to do the same.

The U.S. is backtracking on its words

Poland was more restricted in its options, and giving the MiG-29s to the Americans without any strings attached suggested that the delivery of fighter jets to Ukraine was going to go through. But the MiG-29 story did not end there: Pentagon spokesman John Kirby suddenly announced on the same day that the delivery of these MiG-29s to Ukraine was not a viable solution and worried other NATO member countries. Ukraine should therefore no longer expect to receive fighter jets from other NATO member countries.