They document history's most important moments. They also document that thinking and writing has had more influence on people and events than the use of force or violence.
It is to raise awareness of this principle and to campaign for it to be protected, especially in countries where journalists can be imprisoned simply because they have criticised powerful people.
On 20th July 1969.
Because she was the UK's first female Prime Minister.
He expressed condolences after the most terrible, shocking events had taken place in the United States of America.
Because he was the first black President of the United States.