Science: Starting on 1 June, the next director of Los Alamos National Laboratory will be Charles McMillan, a former nuclear weapons designer who has more than 28 years of scientific and leadership experience in weapons science, stockpile certification, experimental physics, and computational science. McMillan, who has a PhD in physics from MIT, has spent most of his career at Lawrence Livermore National Laboratory, where he managed nuclear weapons research. He joined Los Alamos in 2006 and was principal associate director for weapons programs when he was picked for the laboratory’s top job. McMillan replaces the current director, Michael Anastasio, who announced in January his intention to retire.