China continues expansion with artificial islands, the US raise concern

Satellite images show that the Chinese government continues to rapidly build military bases on the islands of the South China Sea, adding significant military presence in the area very tense.
 According to the Pentagon, over the past two years, China has added 3,200 acres of surface that controls the sea islands of Asia Pacific, excluding here the military presence increased from day to day. In these artificial islands, the official Beijing has built military bases, ports and airports, showing clearly its intention to militarize the area and certainly in order to send a message to countries that have territorial claims with what they will face if you dare more than diplomatic protests. US claim that under international law, they do not give artificial islands China's maritime territorial rights or additional, but significantly improve the country's physical presence in these areas in the longer term plan. It seems that this is the purpose of China, since the laws on paper, if the US and its critics are right, hardly have greater force than the army in the field. Areas of debate in the South China Sea claimed by several countries in the region and accuse China of conquering territories that do not belong. USA is located next to these countries with clear programs to lessen the impact of Beijing, but so far without any great effect, as the Chinese government continues undisturbed what qualifies territorierve its development.