Vanessa Redgrave, Tariq Ali, leads anti-Vietnam War demonstrators as they march towards the U.S. Embassy at Grosvenor Square after a massive rally in Trafalgar Square, on March 17, 1966PA-8630385 - from our story '100 years of Protesting at Trafalgar Square (Part 2)'

Actress Vanessa Redgrave, right, leads anti-Vietnam War demonstrators as they march towards the U.S. Embassy at Grosvenor Square after a massive rally in Trafalgar Square in London, England, on March 17, 1966. Redgrave holds a letter addressed to the U.S. Ambassador. The man next to her is Tariq Ali, a Pakistani citizen, who is chairman of the organizing committee for the protest. (AP Photo)

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