Territorial disputes in the South China Sea top the agenda at Asia's biggest security summit. Natasha Howitt reports.
Tensions in the South China Sea are dominating this year's annual Asia security summit in Singapore. The territorial disputes have become a flashpoint between the U.S. and China in particular. U.S. Defence Secretary Ash Carter has said China's actions risk erecting a "Great Wall of self-isolation". A top Chinese military official says such statements are a fabrication aimed at isolating China. Other regional countries have also expressed concern. Trillions of dollars of trade pass through the waterway each year. Japanese Defence Minister Gen Nakatani says Beijing's actions are coercive, dangerous and a challenge to international law. In recent years, the U.S. has shifted its focus towards the Asia Pacific as China's military, economic and political dominance has grown.