TEHRAN (AFP) — Iran's supreme leader said the country's political establishment should be open to criticism, following a rare protest against President Mahmoud Ahmadinejad, state radio reported on Wednesday. "We should be wary of the day when our young people in universities do not have the motivation to raise questions, issues and demands," Ali Khamenei told a group of students and political activists on Tuesday night. "If sometimes we have said there should be no opposition to the country's officials, this does not mean there should be no criticism," Khamenei said. "This applies to the leadership too." Khamenei's comments came...