The Fiscal Year 2015 edition of Our Changing Planet, USGCRP's annual report to Congress, includes an overview of the USGCRP research enterprise and recent highlights that illustrate how the Program is meeting the mandate of the Global Change Research Act of 1990 and fulfilling the 2012-2021 Strategic Plan. From collecting satellite observations and modeling near-term climate, to supporting adaptation in the Federal Government and building skills among informal educators, to delivering the National Climate Assessment and sustaining the Nation's assessment capacity, this plain-language report demonstrates USGCRP's reach across the spectrum of research, decision support, education, and communication.