British Prime Minister Boris Johnson said on Thursday that a “terrorist” threat remains in Afghanistan but said Britain is “not about to turn away.” He added that the UK would continue to work towards a negotiated settlement in the country and it would have to include the Taliban. Johnson confirmed that most British troops have left Afghanistan, almost 20 years after the UK and other Western countries sent troops into the country to engage in what they described as a “war on terror.” Johnson stressed that the threat posed by al-Qaida to the UK has substantially diminished, but he sidestepped questions about whether the hasty military exodus by the country and its NATO allies risks undoing the work of nearly two decades or leaves Afghanistan vulnerable to the Taliban, which has made rapid advances in many northern districts. The prime minister declined to give details about the troop withdrawal, citing …