Photographer Don McCullin to focus on Vietnam for his final book

Exclusive: The work will feature some of the photographer’s most powerful images from his 70-year careerAfter more than seven decades of covering conflicts around the world, Don McCullin will return to Vietnam and his best-known images for his final book.The photographer, who got his start aged 23 when his image of a gang in Finsbury Park was published in the Observer, has decided to revisit the war and his 12-day s…