John Lennon (in 1968) - "Paul completely. I play the six-string bass on that."
Paul McCartney (in 1984) - "I wrote that as a kind of Beach Boys parody. And 'Back in the USA' was a Chuck Berry song, so it kinda took off from there. I just liked the idea of Georgia girls and talking about places like the Ukraine as if they were California, you know? It was also hands across the water, which I'm still conscious of. 'Cuz they like us out there, even though the bosses in the Krelmin may not. The kids do. And that to me is very important for the future of the race."
Paul McCartney (in 1986) - "I'm sure it pissed Ringo off when he couldn't quite get the drums to 'Back In The USSR,' and I sat in. It's very weird to know that you can do a thing someone else is having trouble with. If you go down and do it, just bluff right through it, you think, 'What the hell, at least I'm helping.' Then the paranoia comes in-- 'But I'm going to show him up!' I was very sensitive to that."