It is more than 30 years since the launch of the first space shuttle.

Milton Silveira has been involved in the programme since the very beginning - long before the first shuttle ever took off.

He talks to Witness.

It is 10 years since riots engulfed the city of Bradford in the North of England.

There were running battles between police and young British Pakistanis.

Mohammed Amran was on the streets throughout.

Photo: Press Association

On July 6 1988 167 people died in a fire on an oil rig in the North Sea.

Roy Carey is one of the survivors.

In a programme first broadcast last year he spoke to Witness.

Photo: VT Freeze Frame

In 1985 the Royal couple made their first joint visit to America.

The highlight of the tour was a gala dinner at the White House where the young Princess danced with John Travolta.

Photo: Associated Press

We take you back more than 40 years to the height of the war in Vietnam.

Alan Johnston talks to the former US Marine and peace activist Ron Kovic about two moments that changed his life forever - one on the battlefield, and one at anti-war protest in Washington.

In 1975 he became the first African-American man to win the tennis tournament.

His friend and agent, Donald Dell, talks about that memorable match - and about what else Ashe might have achieved if he had not died young.

Photo: Ashe at Wimbledon in 1975

Flamenco singing was dwindling in popularity in Spain until the appearance of Camaron de la Isla.

Thousands lined the streets at his funeral in Andalucia in 1992.

Witness speaks to a guitarist called Marcos - one of Camaron's biggest fans and the author of a recent biography.

Photo: Getty Images

In the 1960s British mercenaries joined the fighting in Yemen's civil war.

They trained local tribesmen to fight against Egyptian troops.

Their activities were never officially sanctioned by the British government.

The little boy caught in the middle of a tug-of-war between Miami and Havana.

When armed US agents stormed his relatives' home in Miami a photographer, Alan Diaz, captured the fear on his face.

He talks to Witness about the family, the Pullitzer prize-winning shot and about Elian.

Photo: Associated Press

The Irish author, Colm Toibin remembers President Kennedy returning to the land of his forefathers and being taken to the nation's heart as if he were one of its own.

Photo: JFK in Co.Wexford, PA Wire.