With apologies to Russian Fandom, some of whom may know this story more intimately than the folks at NPR, which is what I link to below.
This (sad, true) story features a Kosygin, which I thought would interest LMB fans. And it is a tragedy, with Leonid Brezhnev seeming to be as cold blooded as Emperor Ezar and as vain as Serg. And a pair of cosmonaut friends who are (perhaps) willing to die to save the other's life. Can you get more Bujoldian?
Warning: the link includes a disturbing picture of the deceased cosmonaut's remains
http://www.npr.org/blogs/krulwich/2011/03/21/134597833/cosmonaut-crashed-into-earth-crying-in-rage