Leader of the Islamic Revolution Ayatollah Seyyed Ali Khamenei says the top world powers have opposed�the Islamic Republic since its inception but have failed to achieve any of�their objectives.

�Since the first day�of the [1979] Revolution until today, the number one materialistic powers in the world have stood against the Islamic establishment but have failed to make any headway in this regard,� the Leader said�in a meeting with the commanders and staff of the Islamic Republic of Iran Air Force on Monday.

Ayatollah Khamenei further urged Iranian officials to be alert as to the�plots against the country. "Remain vigilant about what lies behind enemy smiles," the Leader said.

By Press TV