Two hundred and fifty scientists and representatives from leading research institutions around the world celebrated the inauguration of the Large-Sized Telescope (LST) sub-array at the #CTAO-North site at the Roque de los Muchachos Observatory in La Palma, Spain: https://www.ctao.org/news/the-large-sized-telescope-sub-array-is-inaugurated-on-ctao-north/ - the completion of the four telescopes marks a significant milestone for the global astrophysics community and represents a crucial step toward the full scientific operation of the Cherenkov Telescope Array Observatory (CTAO).