ClimateWire: "Onward!" That's the cheery subject line on the email then-Secretary of State Hillary Clinton sent to U.S. Special Envoy for Climate Change Todd Stern just days after the Copenhagen, Denmark, climate change summit in 2009. As other leaders licked their wounds over the conference -- perceived as a failure by much of the world -- Clinton was upbeat. "I look forward to our next steps to deliver on our accord after we both get some sleep and a few days off. Thanks for all your great work," she told...