UNITED NATIONS (Reuters) - Iran denounced U.S. President Donald Trump s U.N. remarks as  shameless and ignorant  and said his speech on Tuesday showed his lack of knowledge about Tehran s fight against terrorism, the semi-official Fars news agency reported.  Trump s shameless and ignorant remarks, in which he ignored Iran s fight against terrorism, displays his lack of knowledge and unawareness,  Iran s Foreign Minister Mohammad Javad Zarif was quoted as saying. 