On Sept. 9, Jorge Arguello (right), ambassador of Argentina to the United States, visited Fermilab, where he met with Fermilab director Nigel Lockyer (left), Deputy Director Joe Lykken and other scientists and employees. The purpose of the visit was to tour Fermilab’s accelerator, neutrino and dark matter programs, as well as interact with Argentinian scientists at the lab. Photo: Ryan Postel