The tribunal sitting in the Guildhall in Derry is hearing evidence about the circumstances surrounding the events of 30 January 1972 when paratroopers opened fire on the marchers, killing 13 men.
BBC: News Online
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The tribunal is sitting at Central Hall in London for about six weeks before returning to the Guildhall in Derry as it enters its final stages.
BBC: Sir Mike was a captain in the Parachute Regiment at the time