"He had suddenly and unexpectedly parted with the hope that he would ever see the homeland that he loved again, " Mr. Kozyrev said.

WSJ: Boris Berezovsky, Exiled Russian Tycoon, Dies

Jeffrey Kindler, who became chairman and chief executive of Pfizer suddenly and unexpectedly a little more than four years ago, is now retiring suddenly and unexpectedly.

FORBES: Pfizer CEO Retires Suddenly

With his left hand useless, he struggled slowly back to his team-mates in their vehicles, already aware that "the situation had suddenly, unexpectedly and with a high degree of frustration reached a situation where that hand wasn't going to be any good for -40C let along -80".

BBC: Sir Ranulph Fiennes: Diabetes link to Antarctica injury