FILE - Britain's Prime Minister Boris Johnson welcomes Crown Prince of the Emirate of Abu Dhabi, Sheikh Mohammed bin Zayed Al Nahyan, to 10 Downing Street in London, Thursday, Sept. 16, 2021. The moving vans have already started arriving in Downing Street, as Britain's Conservative Party prepares to evict Johnson. Debate about what mark he will leave on his party, his country and the world will linger long after he departs in September. (AP Photo/Frank Augstein, File)