The death toll after an attack on an Iraqi election campaign tent has risen to 22 with more than 60 wounded, medics told Reuters.
A suicide bomber attacked the gathering in the northeastern city of Baquba.
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Aspiring basketball player Stefan Strawder was gunned down as he left a teen night at Club Blu.
The suspect, armed with a gun, was caught on CCTV wearing the fancy dress mask, with a red cap on top.
Despite the apparent weaknesses of her opponent, this week Hillary Clinton must somehow try to reverse her own negative ratings.