The process of writing a new constitution for Iraq appears to be back on track after Sunni Muslims said they would abandon their boycott of the talks.They said their demands for better security and an investigation into the assassination of two of their colleagues had been met. It is hoped future agreement on a constitution will go some way to end insurgent attacks like that in Baghdad which killed at least 12 people. A suicide bomber blew up a minivan packed with explosives near the Sadir hotel in Baghdad. Another bomber struck near the entrance to the fortified Green Zone government area, killing at least three. Another process that authorities hope could calm the security situation is the trial of senior figures close to Saddam Hussein. Images of six of the former president’s men being questioned have been released. Among those facing prosecutors are two half-brothers of Saddam and Ali Hassan Al-Majid, known as Chemical Ali for his role in the gassing of Iraqi Kurds in Halabja in 1988.