US President Donald Trump (C), US First Lady Melania Trump (L) and Britain's Queen Elizabeth II (R) leave the dias to walk through the Quadrangle toward an entrance to Windsor Castle in Windsor, west of London, on July 13, 2018 after a ceremonial welcome on the second day of Trump's UK visit. US President Donald Trump launched an extraordinary attack on Prime Minister Theresa May's Brexit strategy, plunging the transatlantic "special relationship" to a new low as they prepared to meet Friday on the second day of his tumultuous trip to Britain. / AFP PHOTO / POOL / Ben STANSALL