The United States and China invoked 25 percent duties on an additional $16 billion of each other's imports on Thursday in an escalation of the tariff war between the world's two largest economies.The action followed an earlier round of tariffs in July, when Washington imposed 25 percent duties on $34 billion in Chinese goods and Beijing retaliated with tariffs on an equal value of U.S. goods.Amid rising concerns that trade tensions could undermine the global economy, U.S. President Donald Trump's proposed tariffs of up to 25 percent on an additional $200 billion in Chinese products could ta…READ FULL ARTICLE