I believe the apology is very valid and that the commies (both here and abroad) never owned up to their complicity in starting the war.
I'm not convinced we need to apologize, but Russia as well as people like Tito, Ceaucescu and other Communists or pseudo-communists (Tito) that are now long dead, had a whole lot to apologize for. I think the US did the best it could under the circumstances.