Researchers from Fermilab and Brazil pose with the ICEBERG test stand at Fermilab to commemorate the testing of a new filter technology for removing nitrogen from liquid argon. From left: Helio Da Motta, Daniel Souza Correia, Dilson Cardoso, Carlos Escobar, Pascoal Pagliuso, Sergey Koshelev, Roza Doubnik, Robert Mrowca and Flor de Maria Blaszczyk. Photo: Courtesy of Roza Doubnik