British Prime Minister Boris Johnson will urge U.S. President Joe Biden to extend the Kabul evacuation deadline beyond the Aug. 31 deadline, a government minister said on Monday. Johnson is expected to make the request to Biden personally at an emergency G-7 summit on Tuesday, said James Heappey, Britain’s minister for the armed forces. The prime minister, who will host the summit, said on Twitter on Sunday: “It is vital that the international community works together to ensure safe evacuations, prevent a humanitarian crisis and support the Afghan people to secure the gains of the last 20 years.” Some UK military leaders have argued that Britain should keep troops at Kabul airport to continue the evacuation effort even if the Americans leave, but Heappey said, “There is a hard reality that there would be no international airlift without the way that the U.S. are underpinning it.” Britain’s Foreign Secretary Dominic …