The families of 96 people killed in the Hillsborough tragedy saw thousands of official documents relating to the disaster for the first time on Wednesday.
Press Association looks at how that dreadful day unfolded.
:: For the second successive year, Liverpool was drawn to play Nottingham Forest in the FA Cup semi-final. For the second successive year, Hillsborough was chosen as the neutral venue. For the second successive year, Liverpool was allocated the Leppings Lane end of the ground.
:: On a bright sunny day, fans began arriving at the ground early. By 2pm the numbers had increased substantially.
:: With many coaches arriving later than planned due to road works, the sheer scale of supporters still outside the stadium at 2.30pm was more than normal. Police continued with their routine searches of all spectators despite the growing numbers.
:: It is estimated 10,000 supporters are required to pass through one of seven turnstiles at the Leppings Lane end.
:: The bottleneck is starting to cause major problems outside the stadium with the fear rising that the safety of supporters caught in the middle is at risk.
:: The peculiar nature of the Leppings Lane end means a substantial percentage of supporters is already being channelled into the middle section, which in itself is causing a problem.
:: A request to delay the kick-off to ease the growing congestion is rejected.
:: A first request to open the exit gates is also rejected on the grounds of safety.
:: More fans arrive outside the Leppings Lane entry as the situation starts to escalate out of control.
:: A second request to open the exit gates is made, this time from Superintendent Marshall, commander outside the stadium, to Chief Superintendent Duckenfield, who is in overall control.
:: In his own words, Duckenfield 'freezes' before ordering the gates to be opened.
:: Supporters pour through the exit gates. With no direction from either police or stadium officials, most head straight towards a tunnel which gives access to pens 3 and 4, which are already seriously overcrowded as the match itself begins, players of both teams oblivious to the escalating problems.
:: Unaware of the gravity of the situation and believing a pitch invasion was taking place, some police officers attempted to prevent supporters climbing out of the pens.
:: However, other officers could see the disaster that was beginning to unfold and tried to help supporters escape the crush. At 3.06pm, the game is halted and the teams are taken off the field.
:: Slowly, bodies of dead supporters began to be carried onto the pitch. Advertising hoardings were ripped up and used as makeshift stretchers.
:: All but one of the 44 ambulances around the stadium were denied entry to the pitch. The one that did make it turned back when confronted with the sheer scale of the disaster.
:: In total 96 supporters died, the vast majority crushed at the front of pen 3. In addition, 730 were injured inside the ground and a further 36 outside.