If these were the following five world news stories of the day, what order would you put them in: the UK air force accidentally bombs a primary school in a suburb of Raqqa killing 20 ~ a lone gunman in New Orleans kills 20 in a busy shopping centre ~ 20 villagers in Vietnamese village found poisoned after a remote Korean mining operation dumped toxic waste up river ~ a bridge in Belgium collapses during rush hour killing 20 motorists and others ~ Nigerian military overruns a village in the north of the country and finds 20 school girl hostages murdered.