General Vo Nguyen Giap's last battle for the highlands of Vietnam

Ho Chi Minh's former confidante is taking on the Vietnamese government over the environment

Picture Past, April 27: Vietnam protest

1972: 30,000 people protested against President Nixon's involvement in the Vietnam war at a rally in New York

Picture past, January 27: Vietnam

1973: The Vietnam Peace Agreement was signed in Paris

Picture Past, April 30: Vietnam war ends

1975: Saigon fell to the North Vietnamese Army, signalling an official end to the war