Story Highlights:
Bombing kills 30 people, mostly Iraqi soldiers, police recruits
55 others were wounded in the Diyala province attack
Police: Unrelated car bombing in Tikrit kills 4, wounds 14
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See also:
Dazed Iraqi teen suicide bomber says she didn't want to die
Girl, 15, caught with suicide bomb vest
After 5 years of war, Iraqis desperate for water
