A man walks past a the scene of a bombing after at least 20 people were killed when a young female suicide bomber detonated her explosives at a bus station in Maiduguri, northeast Nigeria, on June 22, 2015 in an attack likely to be blamed on Boko Haram.  The blast happened near a fish market in the Baga Road area of the city, which has been repeatedly targeted in recent weeks by shelling, bombs and suicide attacks.  AFP PHOTO/STRINGER        (Photo credit should read STRINGER/AFP/Getty Images)