The Philippines is aiming to strengthen its claims in the South China Sea by potentially building hotels for tourists on its biggest island in the disputed waterway, officials said Tuesday.Manila has administrative control over Thitu – the second-largest naturally occurring landmass in the Spratly archipelago – and wants to bolster its sovereignty by adding new infrastructure.In doing so it will be following in the footsteps of China, which also stakes ownership claims to the Spratlys – along