
DUBAI - A Twitter account Iran experts believe  is run by the office of Supreme Leader Ayatollah Ali Khamenei said on  Tuesday "arrogant" powers had tried hard to bring the Islamic Republic  to its knees but had failed.
In a comment apparently referring to  the failure of Iran and six world powers on Monday to end a 12-year  dispute about Iran's nuclear goals, a message on the English-language  account said: "In the nuclear issue, arrogants have made their best to  bring Iran to its knees but they were not able and will not be able to  do so."