Tensions rise as US and China clash over military jet encounter.

The US has warned China that its refusal to restore high-level military communication could lead to dangerous incidents spiraling out of control. The warning comes after a recent encounter between military aircraft over the South China Sea. China has blamed US sanctions and what it sees as a broader effort to contain its rise, suggesting it's up to Washington to take action that could ease tensions. The US has criticized China for its provocative actions and urged it to alter its behavior. Before high-level diplomacy can move forward, there are a number of obstacles Beijing believes need to be addressed.