The robbery of Belfast's Northern Bank is one of the most audacious thefts in UK history. Armed raiders took £26.5m from the vaults at the headquarters on Donegall Square, quietly loaded it into crates inside a white lorry and drove away into the night.
The crime had huge political ramifications for the Northern Ireland peace process, coming at a particularly delicate time in the negotiations. Despite its notoriety - and the numerous arrests in connection with the robbery over the past four years - no one has been brought to justice.
On December 19 2004 a group of masked and armed gang members arrived at the homes of two Northern Bank executives, Chris Ward and Kevin McMullan, in Poleglass and Loughinisland.
Posing as police officers to gain entry, they held the men and their families at gunpoint. Ward was transferred to McMullen's house while his family remained captive in their home. McMullen's wife was taken to a forest south of Belfast where she was held hostage.
Ward and McMullen were told to go to work at Donegall Square West on Monday and behave as if nothing was wrong, otherwise their families would be killed.
When the bank closed that evening, the two men led the gang members to the underground vaults and opened them. At 7pm, a white van was loaded with crates filled with cash. It returned an hour later for a second collection.
The haul included £10m of uncirculated Northern Bank sterling banknotes, £5.5m of used Northern Bank sterling notes, £4.5m of circulated sterling notes issued by other banks, and small amounts of other currencies, largely euros and US dollars. It was one of the largest amounts of money ever taken in a bank robbery in the UK.
A few hours later, McMullen's wife escaped from the forest. Despite suffering from exposure, she managed to raise the alarm at about 11.45pm. By this time the gang had made its getaway.
As the hunt for the gang continued stretched into weeks, then months, the Police Service of Northern Ireland (PSNI) - along with the British and Irish governments - claimed the IRA was involved.
Sir Hugh Orde, the PSNI chief constable, issued an interim report blaming the IRA. He strongly denied the report was published because of political pressure.
"These cases are extremely complicated. The robbery itself was carried out by a competent group of criminals … This was a particularly brutal crime, people were extremely badly treated and assaulted by the gang,'' he said.
Sinn Fein insisted the IRA had not carried out the robbery and Sinn Fein officials had not known of or sanctioned it. Amid the prolonged political slanging match, there was not enough evidence to prove the involvement of any single group.
The biggest series of arrests was made in February 2005 when seven suspects, including a member of Sinn Fein, were questioned. They were later released.
Police recovered £2m - including £60,000 of Northern Bank notes - during raids in Cork and Dublin.
Around $100,000 in US banknotes was found in the toilet of the police athletics association's Newforge country club. The PSNI confirmed the money was taken during the Northern Bank heist, but said the stash was likely to have been "planted to distract detectives" investigating the robbery and "divert attention from events elsewhere".
In total, 10 people have been arrested and three have been charged in connection with the robbery. However, to the frustration of detectives, no one has been charged with actually carrying it out. To this day, the robbers themselves remain unknown.