A group of U.S. nuclear non-proliferation experts wrote to U.S. Secretary of Energy Ernest Moniz to express their support of the U.S. administration decision to discontinue construction of the MOX Fuel Fabrication Facility (MFFF). The letter addresses one of the main arguments against the decision - the potential difficulty of renegotiating the U.S.-Russian Plutonium Management and Disposition Agreement. Authors of the letter argue that this should not be an excuse for continuing the MFFF project, since "the agreement explicitly allows each side to change plutonium disposition methods and was already modified once." The letter also emphasizes that "there are major arms control, nonproliferation, and nuclear security considerations relating to this project that strongly favor [MOX project] termination."