FILE - A dilapidated but still active Philippine Navy ship BRP Sierra Madre sits at the Second Thomas Shoal, locally known as Ayungin Shoal, at the disputed South China Sea on Aug. 22, 2023. The United States renewed a warning Tuesday, June 18, 2024 that it’s obligated to defend its close treaty ally a day after Filipino navy personnel were injured and their supply boats damaged in one of the most serious confrontations between the Philippines and China in a disputed shoal in the South China Sea, officials said. (AP Photo/Aaron Favila, File)