North Korea has fired another ballistic missile, South Korea's military chiefs say. The Pentagon said it was assessing the "probable" launch, which happened at about 03:30 local time (18:30 GMT). South Korean news agency Yonhap reported that the missile flew eastward from Pyongsong, South Pyongan province. The North has carried out a series of missile tests in recent months, raising tensions with its neighbours and with the US. It is not clear how far the latest missile went or whether it flew over Japan as others did earlier this year. North Korea's last ballistic missile test was in September, days after it had conducted its sixth nuclear test. What damage could North Korea do? Are missiles a risk to planes? Can the world live with a nuclear North Korea? North Korea's missile programme South Korean and US authorities are working together to analyse the latest missile's trajectory, according to a statement from South Korean military chiefs...