The worst school massacre in US history could have been avoided if a search warrant, prepared by sheriff’s deputies a year before the shootings, had been issued, a governor’s commission has found. But authorities failed to recognise and act on numerous signs that two teenagers were planning the deadly 1999 attack on Columbine High School, Colorado, in which Eric Harris nd Dylan Klebold killed 12 students and a teacher before committing suicide. The deputies readied the search warrant for Harris’s home after receiving reports of threats and bomb-making activity.“If the warrant had been issued, this probably wouldn’t have occurred,” William Erickson, chairman of the Columbine review commission, said. Full story www.tes.co.uk