Philippine Defense Secretray Delfin Lorenzana, center, Armed Forces Chief Gen. Eduardo Ano, second from left, and other officials take their oath of allegiance to the flag during their visit to the Philippine-claimed Thitu Island off the disputed South China Sea in western Philippines Friday, April 21, 2017. Their visit Friday was aimed to assert the country's claim to the heartland of the disputed area where China is believed to have added missiles on man-made islands. The South China Sea issue is expected to be discussed in the 20th ASEAN Summit of Leaders next week. (AP Photo/Bullit Marquez)
{}