Mr. Zhao lost his job as head of the party when he refused to send troops against the unarmed students in 1989.

Two hundred thousand armed troops opening fire on unarmed students leave little room for speculation.

His political opponents, however, asserted that he had killed the two unarmed students in a "bar brawl."

Beijing has ruled out a re-evaluation of the crackdown, saying the decision to use military force against unarmed students was "correct".

The Mexican army fired ruthlessly at the unarmed students as well as many other people who let the students take shelter inside their homes.

Some criticized the brutal response of police officers against unarmed student, while others praised Rizzo's action to suppress the demonstration.

When Odighizuwa left the building where the shooting took place, he was approached by two students with personal firearms and one unarmed student.

On a visit home, he witnessed a demonstration of unarmed students and workers in which twenty-one people were killed by government snipers.

The National Guardsmen were walking up a hill when they suddenly wheeled around and fired into a group of unarmed students.

The Guardsmen opened fire on a group of unarmed students, killing four of them, at an average distance of about 345 ft (106m).