What would you say if you met the people responsible for the Bali bombings?

In this two-part Dateline special – starting Tuesday, 28 July at 9.30pm - Nyoman Rencini, who lost her husband and Jan Laczynski, who lost several friends, meet Nasir Abbas, the man who taught the attackers how to improvise bombs, and handle weapons and Ali Imron, one of the terrorists who carried out the attacks.

Like many of the loved ones left behind, Nyoman Rencini has had to raise her kids alone after her husband was killed in the blast. Nyoman’s husband was a taxi driver, and was waiting outside the clubs on Legian Street, when a van, driven by Ali Imron, loaded with explosives and two teenage suicide bombers, blew up.

Australian Jan Laczynski has always felt like Bali was his home away from home - even meeting his wife in Indonesia - but in the years before they met, the place Jan loved most was the Sari Club.  Working for an Australian airline, Jan regularly took advantage of cheap airfares - escaping to Bali for most of his weekends and spending most of his nights at the Sari Club. It’s also where he made a lot of his friends – five of whom worked as security guards at the Sari Club and perished that fateful night.

In part one, Reporter Rebecca Henschke is with Nyoman Rencini, and Jan Laczynski as they meet with Nasir Abbas - a former senior leader in Jemaah Islamiyah, and one of the men responsible for training the Bali bombers in weaponry and warfare which lead to the attacks on Bali.

In part two of Dateline’s special (Tuesday, August 4 at 9.30pm on SBS) Rebecca, Nyoman and Jan meet with Ali Imron. This is the first time Ali Imron has ever met with any victim families or friends of the Bali bombs which is captured in a Jakarta prison.

Nasir is now a part of the Indonesian government’s de-radicalisation program and meets regularly with victims and also those with extreme and radical views.

He tells Dateline: “When my kids went to school, the other children say 'we saw your dad on TV is he a terrorist?' And they ask me, 'are you a terrorist, Dad?' I told them don’t shy away from that question…yes, my father was a terrorist but now he gives counselling to terrorists.”

Before meeting with Ali, Nyoman tells Dateline: “My friend asked, if Ali Imron asks us for forgiveness, will you forgive him or not? I said, I don’t know. Let’s wait and see.”

During the meeting between Australian Jan Laczynski and Ali Imron, Jan asks him: “Why did you drive the bomb vehicle?” and “How do you sleep at night?”.