ISIS is planning to massacre thousands of civilians in public places around the world in 2016 as it desperately seeks to draw the west into a titanic "final battle". The sick terror group will activate hundreds of sleeper cells in "dozens of countries" in an unprecedented bid to destabilise western governments and spark a huge military retaliation in the Middle East. The shock claim, from one of the world's leading authorities on the death cult, comes amid fears of a New Year's Eve terror plot in London and other major world cities. Islamic State has carried out more than 50...