NASA scientists have flown several instruments on high-altitude balloons to study the origin of cosmic rays. The Balloon Experiment Superconducting Spectrometer (BESS), in partnership with the University of Tokyo, observes antimatter cosmic rays. The Cosmic Ray Energetic and Mass (CREAM) with University of Maryland, targets high-energy cosmic rays. And the Super Trans-Iron Galactic Element Recorder (SuperTIGER) with Washington University, focuses on cosmic ray elemental abundances.