Sunni Arab members of a committee drafting Iraq's new constitution have ended their boycott, six days after they walked out to protest at the assassinations of two fellow Sunni constitution commissioners. The Sunni decision lifted the threat that the country's new constitution would be a product of only two of three major Iraqi ethnic and religious groups, leaving out the Sunni Arabs who form the core of the insurgency and thus failing to provide hope of a political exit from the incessant violence gripping the country. A spokesman said six of the 12 Sunnis on the committee rejoined their colleagues at a meeting. The others were absent because they lived too far from Baghdad or had other personal commitments.