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The article reports that the scientists of SLAC National Accelerator Laboratory in Menlo Park, California, have successfully completed a free-electron laser (FEL) facility which can achieve lasing at a wavelength of 1.5 Å. Experts believe that this FEL, the first to operate in the hard X-ray regime, will open up vast new areas for scientific exploration in the field of light-source science. They state that this source will help in study of atomic and molecular science.