<span style="color: #222222;">World leaders have hailed the defeat of Islamic State after US-backed Syrian Democratic Forces announced that they have liberated the terror group's last stronghold Baghuz town in Syria.</span><br />'' <br />'' <span style="color: #222222;">US President Donald Trump welcomed the fall of the group's five-year caliphate but said that it remained a threat. He said, the US would remain vigilant until IS is finally defeated.</span><br />'' <span style="color: #222222;">British Prime Minister Theresa May vowed to carry on fighting the terrorist ideology. She also praised the courage of the British forces that fought in Syria and Iraq alongside a US-led global military coalition.</span><br />'' <br />'' <span style="color: #222222;">French President Emmanuel Macron said, the fall of the caliphate has removed a source of potential terror attacks against France. He said, a significant threat to the country has been eliminated but the fight against terror groups must continue.</span><br />