A top adviser to Supreme Leader Ayatollah Ali Khamenei said on Thursday Iran will not yield to “useless” U.S. threats from “an inexperienced person” over its ballistic missile program. U.S. President Donald Trump’s national security adviser, Michael Flynn, said on Wednesday the United States was putting Iran on notice over its “destabilizing activity” after it test-fired a ballistic missile.

Trump echoed that language on Thursday, saying in a tweet “Iran has been formally put on notice” after his administration said it was reviewing how to respond to the launch that Iran said was solely for defensive purposes. Iran said on Wednesday it had tested the new ballistic missile but said it did not breach a nuclear deal reached with six major powers in 2015 or a U.N. Security Council resolution that endorsed the accord. READ MORE