From Roger Cohen, our man in Tehran:

As dusk comes, people gather on the roofs of their apartment buildings and the haunting sound of “Allah-u-Akbar” — God is great — and “Death to the dictator” echoes across the megalopolis.

The Iranian yearning in these cries is immense, a measure of all that was not delivered by the 1979 revolution, when the same cries went up and liberation was promised.