this is bbc news. the headlines... president biden says the withdrawal of us troops from afghanistan is on track, but won't be completed in the next few days. he was speaking hours after the us left its main military base in the country, bagram, which served as the hub of us—led operations for almost two decades. 20 people are now confirmed dead in the surfside apartment collapse in miami, and more than 140 people are still unaccounted for. rescuers who continue to search through the rubble want to make as much progress as possible before the expected arrival of a hurricane this weekend. on her final official visit to the uk, chancellor angela merkel has been visiting the queen and addressed a virtual cabinet meeting. earlier she said britons who've had both covid jabs should be able to visit germany in the foreseeable future without quarantine.