Amid tension in the South China Sea, the US conducts drills and mocks China on Twitter. The US Navy tweets, "How we roll. In case you missed it: The USS Nimitz (CVN 68) and Ronald Reagan CSGs are conducting dual-carrier operations as the Nimitz Carrier Strike Force in the South China Sea." Global Times, the mouthpiece of Chinese Communist Party, last week threatened the US saying that China has anti-aircraft carrier weapons like DF-21D and DF-26 aircraft carrier killer missiles. Replying to the same, the US Navy's chief of information tweeted, "And yet, there they are. Two @USNavy aircraft carriers operating in the international waters of the South China Sea. #USSNimitz & #USSRonaldReagan are not intimidated #AtOurDiscretion."