1. "At night, the burning ends of their cigarettes glowed from the greenery like deadly fireflies" (262; ch. 20). It's a simile, because he's comparing the lit cigarettes to fireflies using "like."
2. "'The circus,' Suleman said, smiling proudly up at Mortenson, like a student demonstrating an impressive project at a science fair" (262; ch. 20). It's a simile, because the author is comparing Suleman presenting the reporters to a kid presenting a science project using "like."
3. "'I'm sure we can clear all this up,' he said, flashing a grin meant to be disarming as he took a pen out of his pocket and slid a notebook into place like a soldier ramming an ammunition cartridge into a military sidearm" (270; ch. 20). It's a simile, because he's comparing the soldier sliding the notebook to with using an ammunition cartridge using "like."
"'We women of Afghanistan see the light through education,' Uzra replied. 'Not through this or that hole in a piece of cloth'" (289; ch. 21). Uzra Faizad, the principal of the Durkhani School, is being interviewed about wearing a burkha. She explained that she felt safer wearing it, and it wasn't really important.