China allows no public discussion of the events of June 3 and 4 1989, when soldiers backed by tanks and armoured personnel carriers fought their way into the heart of the city, killing hundreds of unarmed protesters and onlookers.
The government has never issued a complete, formal accounting of the crackdown or the number of casualties.
More top news
Glaucoma is the biggest cause of permanent blindness and affects 60 million people around the world - a tenth of whom are completely blind.
United Airlines has apologised for its initial response after a passenger was injured as he was forcibly removed from an overbooked flight.
It is said that the teenager attacked and raped the woman, in her forties, on April 19 near to a park in Kidbrooke, south-east London.