welcome to our viewers on pbs in america and around the globe. the thai government says the entire nation is in grief after a former police officer killed at least 38 people in a gun and knife attack at a nursery. he then killed himself and his family following the massacre in nong bua lamphu province in the north east of the country. most of the victims were children. thailand s king is expected to visit the town of utthai sawan. our south east asia correspondent jonathan head is at the scene. and a warning, his report contains some very distressing images. people crying, wailing this is a community now consumed by grief and shock, that children so young had been deliberately killed by a fellow parent. the children were taking a midday nap inside the nursery when the attacker turned up to collect his son, who wasn t there, and then opened fire. translation: it all. went down really fast. he was slashing the knife. he didn t use the gun. he kept slashing in there, it s all by