I can't believe I missed this conversation when it was going on. Just to confirm (since the tours are the topic of my research): the Bolshoi first appeared as a group in the US in 1959. They had sent films over previously, including Romeo and Juliet with Ulanova and Zhdanov, the Stars of the Bolshoi, and Swan Lake with Plisetskaya.
This does, however, allow me to introduce a quote I've been hoping to bring to the forum for the past few weeks. In a book of interviews that Ulanova did with Sania Alievna Davlekamova in the 1990s, Ulanova discusses her version of the Odette/Odile role: (this is my translation from Russian and thus slightly awkward)
The most sacred question (and even that could be long argued): should Odette resemble Odile? In general they should in some way since the Prince mixes them up. But in what way should she resemble her? And in what way entirely not resemble her? In other words why are there two roles? Odette is almost unearthly, spellbound, magical, whereas Odile is in some ways heartfelt, but earthy. It’s difficult to explain: well more concretely ... Odile is living, passionate, open. Odette is reserved, ‘silent’, responds to the Prince timidly, untrustingly... Whereas in Odile this timidity is overcome, that which was closed in Odette begins to open up. For this reason the Prince both recognizes and does not recognizes Odette in her.
It’s possible to do this with a big contrast: almost totally different, only a certain gesture or movement that resembles Odette breaking through. As though she has accidentally revealed this to the Prince... Every actress chooses for herself.
I chose: my Odile resembled the enchanted swan. I didn’t make her ... as extravagant, if it could be said that way. But very earthy, very vital.