Asian stocks pull back as Hong Kong uncertainty weighs

NEW YORK (Reuters) - Asian shares shed some of their recent gains on Wednesday as investor concerns about rising tensions between the United States and China tempered optimism about a re-opening of the world economy.U.S. President Donald Trump said late on Tuesday he is preparing to take action against China this week over its effort to impose national security laws on Hong Kong, but gave no further details.Worsening relations between the world's two biggest economies will further hobble global..