But back to Warsaw (where I'll be next week), where the main objective will be to set negotiations rolling towards a new agreement to be signed in 2015 and to take effect in 2020 when Kyoto runs out.
First, will the American strategy of "rolling over" the negotiations indefinitely work in terms of the administration's self-defined conception of America interests?
John Nicolson, SNP MP and member of the Commons select committee on culture, media and sport, accused Hall of "rolling over" in his negotiations with the government and told him his staff regarded it as a "huge defeat".
But he began rolling back as the negotiations moved ahead and was adamant, after the Thursday announcement of a deal in principle, that there was no deal he had blessed.
Asked Monday to comment on Gabriel's remarks, Margaritis Schinas, chief spokesman for the European commission, told reporters that "although trade talks take time, the ball is rolling right now," and that the EU-US negotiations have entered "a crucial stage".
He also said Israel was openly contradicting itself by saying it was ready to start peace negotiations while keeping its tanks rolling.
Starting November 3 in 1986, Amador Valley teachers went on a rolling strike to "protest a breakdown in negotiations for a new contract".
The two men sat in a dull gray room - one on a couch, the other on a rolling desk chair - and began the negotiation that would transform a franchise.
Republican lawmakers in Congress have proposed rolling back several environmental regulations and undoing years of negotiation over water issues in an effort to end what they are calling a "man-made drought".
Republicans' success in rolling the Obama administration and wringing concessions in 2011, by holding the debt-ceiling negotiations hostage, led them to do it again.
