New York Times: Most nations seeking to negotiate a new accord on climate change in Copenhagen worked out their negotiating tactics in advance. Embarrassingly for the European Union, which claims to be the in the vanguard of environmental issues, its leaders are still figuring out their game plan for the United Nations climate summit meeting that began on Monday in the Danish capital. As the first week of talks draw to a close, heads of state and government from the E.U. will meet for their …