Reuters: A group of 26 influential world leaders had constructive talks overnight on how to unblock climate negotiations on the last day of a summit in Copenhagen, the talks’ host said on Friday. "We discussed how we can make progress, and we had a very fruitful, constructive dialogue … for almost two hours," Danish Prime Minister Lars Lokke Rasmussen told reporters. Rasmussen called the late-night talks to overcome the main obstacles and work on a short political declaration in the …