Fermilab Director Lia Merminga (center, left) and Sanford Underground Research Facility Director Mike Headley (center, right) cut the ribbon to mark the completion of the three-year excavation of the caverns for the Long-Baseline Neutrino Facility/Deep Underground Neutrino Experiment. Supporters and people instrumental in the project helping to hold the ribbon are (left to right): LBNF/DUNE-US Federal Project Director Adam Bihary, CERN Senior Scientist and Neutrino Platform Project Leader Francesco Lanni, DUNE Collaboration Co-spokesperson Sergio Bertolucci, President and CEO of Universities Research Association John Mester, Department of Energy Assoc. Director for the Office of High Energy Physics Gina Rameika, DOE Principal Deputy Under Secretary for Science and Innovation Derek Passarelli, DOE Chief of Staff of Secretary Jennifer Granholm Christopher Davis, Acting DOE Director of the Office of Science and Deputy Director for Science Programs Harriet Kung, South Dakota Lt. Gov. Larry Rhoden, U.S. Senator for S.D. Mike Rounds, U.S. Rep. for S.D. Dusty Johnson, University of Campinas Rector Antonio José de Almedia Meirelles, LBNF/DUNE-US Project Director Jim Kerby.