The day after a deadline for concluding a nuclear agreement was extended for seven months, Iran ’s supreme leader, Ayatollah Ali Khamenei , delivered his first remarks on the negotiations, saying that the West had failed to bring Iran “to its knees.” Meeting Tuesday with Muslim clerics in Tehran, the Iranian capital, Mr. Khamenei dismissed the diplomatic and economic pressure that world powers have brought to bear on his country over its nuclear ambitions. “In the nuclear issue, America and colonial European countries got together and did their best to bring the Islamic Republic to its knees, but they could not do so — and they will not be able to do so,” Mr. Khamenei’s personal website quoted him as saying. Mr. Khamenei has the final say on all important policy matters in Iran, including its nuclear program . His remarks suggested that he would continue to […]