Russia and US renew nuclear talks
Mr Obama said...
Russia and the US are to reopen negotiations about reducing their nuclear warheads, presidents Dmitry Medvedev and Barack Obama have said, according to BBC.
The discussions will be the first such talks for more than a decade.
Mr Obama said earlier there were very real differences between Washington and Moscow, but that there was also a broad set of common interests.
The announcement came on the fringes of the G20 summit of world leaders which is convening in London.
Mr Medvedev has invited his American counterpart to visit Moscow in July - an invitation Mr Obama has accepted.
In a joint statement, the two leaders said they had ordered nuclear negotiators to report first results in July.
Mr Obama said the US and Russia would be in a much stronger position to strengthen the non-proliferation treaty if they were to lead by example and reduce their own nuclear arsenals.
Their statement also called on Iran to co-operate with the UN nuclear watchdog and prove its nuclear programme is "peaceful" in nature.
The two presidents also agreed to work together on Afghanistan and expressed concern about an upcoming North Korean rocket launch.
World leaders are gathering in London to discuss ways to resolve the financial crisis, which Mr Obama has said was the most severe since World War II.