Warnings ISIS are 'bigger than ever' as fighters make comeback after US exit from Syria

ISIS is bigger than ever and its bloodthirsty fighters have millions in funds at their disposal,  world leaders are warning.

Islamic State suffered blows to its territory and shrank to a shadow of its former self as its leaders were killed or imprisoned in the years since it declared a caliphate.

US President Donald Trump declared victory over ISIS after the US wiped out its feared figurehead, Abu Bakr...