title: Ralph J. Cicerone (1943-2016).
authors.affiliation: John P. Holdren is Assistant to the President for Science and Technology and Director of the White House Office of Science and Technology Policy. mmcnutt@nas.edu john_p._holdren@ostp.eop.gov.
authors.forename: John P
authors.initials: JP
authors.lastname: Holdren
authors.affiliation: Marcia K. McNutt is the President of the United States National Academy of Sciences. mmcnutt@nas.edu john_p._holdren@ostp.eop.gov.
authors.forename: Marcia K
authors.initials: MK
authors.lastname: McNutt