The Office of Science and Technology Policy (OSTP) is tasked with producing a National Climate Assessment (NCA) in 2013. Due to the multiple interactions of nitrogen with climate change mitigation, adaptation, and impacts, we were invited by OSTP to submit a technical report that assesses nitrogen-interactions in the USA. The report was submitted on March 1, 2012, and is available for download here. Each of the seven chapters of the report has gone through peer review and will soon be available here and on the web site for the journal, Biogeochemistry. This assessment of climate-nitrogen interactions represents the first installment of a national nitrogen assessment for the USA. Subsequent RCN workshop products will provide additional installments. View Report.