(Reuters) – A four-year-old boy photographed in a Kabul mosque last week as police desperately tried to call him to safety during an attack by Islamic State gunmen is back with his family but still suffering nightmares, his father said. Ali Ahmad was with his grandfather in the Shi’ite Imam Zaman mosque on Friday when at least two attackers in police uniforms stormed in, one exploding a suicide-bomb vest and the other firing indiscriminately at the hundreds of worshippers inside.