Chinese jet buzzed Air Force plane: US 

Bloomberg

A Chinese fighter plane flew within 20 feet (6 metres) of a US Air Force reconnaissance aircraft over the South China Sea in what the US Indo-Pacific Command called “an unsafe maneuver.”
The unusually close encounter happened on December 21 but wasn’t disclosed until later, when the command issued a statement after verifying the details and getting approval to declassify images including a video.
The US RC-135 “was lawfully conducting routine operations over the South China Sea in international airspace” when the Chinese pilot “flew an unsafe maneuver by flying in front of and within 20 feet of the nose of the RC-135, forcing the RC-135 to take evasive maneuvers to avoid a collision,” the command said in a statement.
China asserts rights to more than 80% of the South China Sea based on a 1947 map showing vague markings that have since become known as the “nine-dash line.”