A calculation in this issue shows X-ray lasers might be feasible, and points to horrendous difficulties ahead. But the case for putting and end to the search for ballistic missile defences rests elsewhere.
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How and when to halt SDI. Nature 328, 461–462 (1987). https://doi.org/10.1038/328461a0
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DOI: https://doi.org/10.1038/328461a0
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