Mourners on the Indonesian island of Bali are marking the fourth anniversary of the deadly 2002 bombings.
Many Australians were among the mourners
They laid wreaths for those who died, and unfurled a long piece of white cloth to symbolise peace.
A total of 202 people were killed in the triple bombing - many of them Australian holidaymakers.
The attacks have been blamed on the South East Asian militant group Jemaah Islamiah - as was another attack in the area last year, which killed 20 people.
At an early morning ceremony overlooking Bali's beaches, mourners and foreign dignitaries gathered to pay their respects.
Alief, an eight-year-old Indonesian, said he still missed his father Imawan Sarjono, who was killed in the attacks.
Many of the mourners were Australian, and the country's ambassador to Indonesia, Bill Farmer, also took part in the ceremony.
"We will not allow terrorists to spread disorder and dismay, to drive people, faiths and neighbours apart," Mr Farmer said.
Other mourners unfurled a 12km (7 mile) white cloth down the streets of the Kuta beach area where the attack took place.
One of the organisers, Save Dagun, explained that the cloth was "a symbol of our willingness to forget the past while at the same time recalling the tragedies that have hit this land".
Indonesia has arrested more than 300 terrorist suspects since the attacks in 2002, and has tried more than two thirds of them.
Three men sentenced to death for their part in the bombings - Amrozi, Mukhlas and Imam Samudra - are in the process of a final appeal against their sentences.
Another suspected ringleader, Azahari Husin, has been killed.
Analysts in Jakarta say the success of Indonesia's counter-terrorism squad has damaged the capability of militant groups to launch attacks.
But they also warn that a number of smaller, fragmented movements remain active in the country.
One such movement, led by the militant leader Noordin Mohamed Top, is alleged to have carried out the second Bali attacks last year.