Bomb squad deals with wartime explosive found on Portobello beach / Australian police probe if explosives stashed for antisemitic 'terrorism' / Teachers undergo training to manage bomb threats better / Bomb threats at multiple Delhi schools spark panic and security scramble / 'Bomb threat' at Mumbai court hearing Malegaon blast case / Law enforcement: Bomb-making materials found in vehicle and home of Trump rally shooting suspect / Bomb threat at Delhi-NCR schools: Here's what we know so far