Last year was the deadliest year in Iraq since 2003 . Security void in Iraq has allowed al Qaeda - linked groups to strengthen . Iraqi troops are now battling insurgents in both places for control . Al Qaeda - linked groups are mounting attacks on both sides of Iraq 's border with Iran .
Last year was the deadliest year in Iraq since 2003 . Security void in Iraq has allowed al Qaeda - linked groups to strengthen . Al Qaeda - linked groups are mounting attacks on both sides of Iraq 's border with Iran .