China-U.S. divide looms on security

The annual Shangri-La security dialogue has concluded. This year's security dialogue took place against heightened worries regarding possible collisions between the two militaries in the airspace over the South China Sea and in the waters of the Taiwan Strait. What security concepts have the two countries laid out for the region? How different are they? And what contradictions does China see in the U.S. strategy for the region?