Joe Biden will issue a warning to Beijing about their aggressive actions in the South China Sea, as fears over a military conflict between China and the Philippines brew. The US President will express concern about the Philippines-occupied Second Thomas Shoal, a submerged reef in the South China Sea, at an upcoming summit between the US, the Philippines, and Japan later this week. The reef has been claimed by many countries – including China, Taiwan and Vietnam. The latest escalation in tensions between Beijing and Manila came on March 23, after three Filipino sailors were injured after the Ch…