A group at the University of Utah believes they have made a hard x‐ray laser. The strikingly simple experiment was reported by John G. Kepros in a post‐deadline paper at the Third Rochester Conference on Coherence and Quantum Optics at the end of June. Subsequently Edward M. Eyring, F. William Cagle Jr and Kepros published a paper in theProceedings of the National Academy of Sciences(69, 1744, 1972).