Vietnam confronts China with island building in South China Sea

FILE - An aerial view shows Southwest Cay, also known as Pugad Island, controlled by Vietnam and part of the Spratly Islands in the disputed South China Sea, April 21, 2017. China claims most of the South China Sea as its own territory.

Vietnam has ramped up its building of islands in the disputed South China Sea to bolster its position in relation to China, say experts, but does not pose any threat to the other main claimant in the area, the Philippines.