While there is strong consensus that our Earth is warming globally, there is considerable debate about the timing and magnitude of how global warming will impact us where we live. The world-class ARM Climate Research Facility provides long-term, high quality measurements at climatically diverse and challenging locales around the world to provide researchers with observations needed to identify the critical processes that drive our climate, develop the algorithms to improve models that provide climate forecasts, and validate research results and model predictions. So, based on the key findings of over 5,000 researchers over the past two decades, where are we?