Recently, on a visit to Stanford Center at Peking University in China, U.S. Pacific Command, Adm. Harry Harris Jr. clarified and defended decisions to sail a U.S. naval destroyer near a Chinese occupied island in the disputed water of South China Sea.

Harris, acknowledged the dispute but continued to stress the increasing cooperation between both the U.S. and Chinese militaries, giving the coordinated search for missing Malaysia Airlines Flight MH370 as an example.

Despite these corporations, the U.S. and many other regional governments continue to express concern over the China’s building of artificial islands and then using those islands as landing strips with placed surveillance

According to Harris, last week’s action by the USS Lassen was designed to show that the United States would not tolerate any interference with freedom of navigation in nearby waters.

$5 trillion in global trade pass every year through the South China Sea. China claims most of it, though Vietnam, Malaysia, Brunei, the Philippines and Taiwan have made rival claims.

China protested the Lassen patrol, calling it a “deliberate provocation,” and sent two warships to shadow the U.S. vessel and issue warnings. International law allows warships to transit other countries’ territorial seas under the principle of “innocent passage.”

Despite Beijing’s intense displeasure, the U.S. Government will continue to patrol those areas in the South China Sea. Admiral Harris said in a prepared statement, “These operations serve to protect the rights, freedoms and lawful uses of the sea and airspace guaranteed to all nations under international law.”