A Gulfstream V aircraft referred to by researchers as HIAPER (High-performance Instrumented Airborne Platform for Environmental Research), fitted with an airborne sampling unit to measure carbon dioxide and other greenhouse gases in the atmosphere (in yellow, fitted beneath wing) is seen in a hangar in Bloomfield, Colorado in this picture taken May 5, 2009. Targets and trust. These are at the heart of a tougher new global climate pact possibly just weeks away. The bigger the pledged emissions cuts or reductions in growth in carbon dioxide pollution, the greater the need to prove nations meet those targets and curb the pace of climate change. Photo taken May 5, 2009.