US President Donald Trump speaks with Britain's Queen Elizabeth II as US First Lady Melania Trump looks on at Windsor Castle in Windsor, west of London, on July 13, 2018 on the second day of Trump's UK visit. US President Donald Trump on Friday played down his extraordinary attack on Britain's plans for Brexit, praising Prime Minister Theresa May and insisting bilateral relations "have never been stronger", even as tens of thousands protested in London against his visit. / AFP PHOTO / Brendan Smialowski