MANILA, Philippines — Filipino and US troops have launched weeklong joint exercises that include amphibious operations in support of counterterrorism. The Marine Exercise 2022 Philippines (MAREX 22 PH) officially began Thursday in opening ceremonies at Fort Bonifacio. Commandant Maj. Gen. Ariel Caculitan of the Philippine Marine Corps (PMC) led the opening rites as keynote speaker. Marine Corps Public Affairs Office chief Maj. Emery Torre said MAREX 22 aims to develop Phl-US Marine Forces’ capabilities in amphibious operations, internal security operations and humanitarian assistance and disas…