US president Joe Biden has warned the terrorists who carried out the shocking double suicide attack in Kabul yesterday: “We will hunt you down and make you pay”. At least 60 civilians and 13 US soldiers were killed when bombers detonated their devices close to where people were waiting to flee the Afghan capital. Biden told the American people that the dead soldiers were “heroes” on a selfless mission, but declined to extend his deadline of Tuesday for the withdrawal of US forces.