Whatever one thinks about Vladimir Putin/ Dmitri Medvedev's government in Russia, one cannot deny that Russia is an important player in its own right, as well as in current hotspots like Iran, Afghanistan and North Korea, all of which border Russia or its former empire.
President Obama clearly sees this, and is making his first visit to the country next week less than six months after taking office. The talks will cover non-proliferation, disarmament and the key regional issues where Russia is an important player.
This is in stark contrast to Gordon Brown, who, as I blogged here in February, has not visited Russia for years, and hasn't met Vladimir Putin anywhere since he became PM in 2007.
As David Hughes at the Telegraph pointed out last year, in 2000 Blair made sure he was the first Western leader to meet Putin (rather like he was with Obama too, for that matter!). So as British relations with Iran hit an all-time low, Brown has no friends in the region to call on who might help.