By Emma Simpson
BBC News, Moscow
Relatives of victims of the Dubrovka theatre siege have held a ceremony in Moscow to remember those who died.
Children laid tributes outside the Dubrovka theatre
On 26 October 2002, security forces stormed the building to bring an end to the stand-off with 41 Chechen rebels who had taken the audience hostage.
All the attackers were killed, but so too were 130 civilians, most of whom died from the poisonous gas used by the authorities to subdue the rebels.
Families are demanding a new investigation into the incident.
One by one, the names of all the victims were read out to a small gathering of relatives outside the Dubrovka theatre.
As the first snowfall of winter covered the crowd, local schoolchildren placed flowers on the steps where Tatyana Karpova's son, Alexander, was among those killed in the attack.
"It's a very difficult day for us, and today, we decided to remember each of these people, and we name them," she said.
Later, she read out a statement to President Vladimir Putin, demanding a new investigation into the attack. These relatives want to know what the gas was that killed so many people, and for someone to be held responsible for the way security forces stormed the theatre.
Several mothers who lost children in last year's school siege in Beslan also took part.
Rita Sedakova lost her daughter when security forces stormed the school to end the siege. She told me why she had come.
"All these children are our children now too. Three years ago we watched on TV what was happening here, and then, the sorrow came to us."
The mothers of Beslan have now joined forces with the families of the Dubrovka siege, as well as those affected by some of Russia's other terror attacks, to form a new group to try to find out the truth and to prevent more lives from being lost.