A series of bombings have targeted busy Baghdad markets this week.
In the deadliest attack, at least 88 people died and more than 150 were wounded in two closely timed car bombings on January 22.
(AFP, AP, Reuters)
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SUNNI, SHI'A: Iraq is riven along sectarian lines, faults that frequently produce violent clashes and are a constant source of tension. Sectarian concerns drive much of Iraqi politics and are the main threat to the country's fragile security environment.