A follower is killed at Shariatmadari's residence

The repression of demonstrators produced another group of martyrs and sustained the escalating cycle of mourning.

Merchants, clerics and students helped organize closures and public gatherings beyond formal political parties.

The Yazd protests showed that opposition was not confined to Tehran and had acquired a genuinely national reach.

Forty-day memorials again became political demonstrations across Iran.

Security forces violated the home of Ayatollah Shariatmadari in Qom during the unrest, deepening clerical opposition.

The assault weakened hopes that limited reform could contain the crisis and widened clerical resistance to the Shah.

The Shah removed the long-serving head of the security service as unrest undermined confidence in the regime.

A new director was appointed in an attempt to change the public face and methods of the monarchy's security apparatus.

Revolution supporters interpreted the personnel change as evidence that sustained protest could force retreats from the state.

Changing its director did not erase memories of imprisonment, torture and surveillance under royal rule.