As Mohammad clambered out of a second-floor window at Kabul University on Monday to escape gunmen rampaging across the campus, he was sure death was close. Minutes earlier, the 20-year-old had been sitting in his classroom in the Afghan university's National Legal Training Centre building, waiting for a lecturer at the start of what should have been a regular Monday morning. Then three gunmen began shooting, killing at least 35 in an attack on unarmed young people that has shocked a country where insurgent violence is common despite peace talks between Taliban militants and the U.S.-backed government.