Neda Agha Soltan has become the symbol of the Iranian Green Revolution. Her death was caught on camera after she was struck by a bullet in protests last summer.
Images of her blood splattered face were uploaded to the internet and beamed around the world, though hers was just one of many deaths on the streets of Tehran during the protests that followed the disputed presidential elections.
A documentary about her called For Neda, has just been released online. It was made by Anthony Thomas with help from a young Iranian journalist, Saeed Kamali Dehghan.
Saeed was quite new to reporting when he began filing stories on the demonstrations last year, but after the authorities started expelling foreign journalists, Saeed's work became more crucial.
As his profile increased and he came to the attention of the Iranian authorities, he felt it was time to leave the country.
He came into the Outlook studio in London to talk about the protest and the hard decisions he has had to make.
Film director: Antony Thomas
Produced by: Mentorn Media for HBO