So that's a very tight timeline," Presidents Obama and Medvedev have instructed their arms negotiators to provide a progress report by July when the American leader is expected to visit Moscow for a summit meeting.

VOA: standard.2009.04.08

But it costs money," The report comes in the lead up to the December meeting of the Copenhagen Climate Change Conference, to agree on a new climate pact before the end of the Kyoto Protocol in 2012.

VOA: standard.2009.09.01