These four pressure-tested this vessel to check for leaks and certify it for use. This is the pressure-containing vessel for a new liquid-argon bubble chamber being constructed by the SBC collaboration. The vessel will be used for coherent elastic neutrino-nucleus scattering detection at a reactor after taking calibration data underground at NuMI. An identical chamber will be built at SNOLAB to search for WIMPs as well. From left: TJ Whitis, Matt Bressler, Rocco Coppejans, Eric Dahl. Photo: Leticia Shaddix