The black box sits on the army truck dashboard like a talisman, its tiny screen lighting up with warnings when Russian drones are above us. We are driving fast along a country road in the darkness near the front lines outside Kharkiv. Like many in this war, the soldiers inside have come to revere the

US President Joe Biden has ended his re-election campaign and endorsed Vice-President Kamala Harris to succeed him as the Democratic candidate, in an extraordinary decision that upends an already dramatic race for the White House. Mr Biden, 81, said in a Sunday written statement that it was the “greatest honour” to serve but his withdrawal