The two sides have been negotiating a new treaty to reduce nuclear arms, to replace a treaty that ends in December.

VOA: special.2009.09.19

Details of a separate arms agreement signed by the two countries are not immediately available.

VOA: standard.2009.12.08

But a joint statement issued April 1 after the first meeting in London between presidents Obama and Medvedev said: "The relationship between offensive and defensive arms will be discussed by the two governments."

VOA: standard.2009.07.15

Secretary Clinton, who is due to leave Russia on Thursday, praised the cooperation between the two countries on other issues, including the renegotiation of the current Strategic Nuclear Arms Reduction Treaty which expires in December.

VOA: standard.2009.10.13

Many political analysts say that close cooperation between Beijing and Washington in issues ranging from the global economic slowdown to North Korea's nuclear arms make it unlikely the two countries will engage in a punitive trade war.

VOA: standard.2009.09.14

Experts say the two sides also will discuss a host of other issues, including arms control after the recent signing of the New START Treaty, what to do about Iran following tougher United Nations sanctions, as well as trade and economic questions.

VOA: standard.2010.06.18