US President-elect Joe Biden will formally introduce the first people he has chosen for his cabinet later, as the transition of power gathers pace. Many of the choices, already announced, are Mr Biden's colleagues from his years in the Obama administration. John Kerry will be climate envoy, while foreign policy veteran Antony Blinken is nominated for secretary of state. President Donald Trump has finally agreed that the transition process should start, after weeks of wrangling. The General Services Administration (GSA), the federal agency overseeing the handover, said it was now acknowledging Mr Biden as the "apparent winner" of the 3 November election. The move grants the Democrat access to millions of dollars in funds, as well as access to national security briefings and government officials, so he can properly prepare to take over the presidency on 20 January. Mr Trump said the GSA must "do what needs to be done", but still refuses to concede the election, repeating unsubstantiated claims of a "rigged election".