Click on the 'Listen' button above to hear this interview.
Tension continues to mount in the South China Sea. Last month, an international tribunal in The Hague decided in favor of the Philippine's claims to territories in the South China Sea, but now it appears that China is stepping up its presence there with a so-called "invasion force" of coast guard ships and fishing vessels.
Chinese President Xi Jinping has publicly stated that the islands being built in the South China Sea are not for militarization. But for new satellite images released by the Center for Strategic and International Studies show aircraft hangars being built on the islands.
Peter Dutton, a professor and director of the China Maritime Studies Institute at the U.S. Naval War College, weighs in. Click on the 'Listen' button above to hear the full interview.