2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/6732We describe development of hard x-ray focusing optics telescopes at the National Space Science and Technology Center (NSSTC).To appear in "Young Neutron Stars and Their Environments"(IAU Symposium 218, ASP Conference Proceedings), eds F. Camilo and B. M. GaenslerAstrophysicstext