DUNE is an ambitious international program aiming for discovery in neutrino oscillation physics as well as in searches for nucleon decay and studies of neutrinos from core-collapse supernovae. The central elements of the experimental platform that will enable this program include a new, high-intensity neutrino beam line that will be constructed at Fermilab and a suite of massive liquid argon time projection chambers (LArTPC's) to be deployed deep underground in the former Homestake gold mine, now home to the Sanford Underground Research Facility, in Lead, South Dakota. I will describe the scientific context in which DUNE sits, talk about several aspects of technology development for DUNE including work toward efficient detection of scintillation photons in large-volume LArTPC's, and summarize the status and outlook for DUNE.