The Marine One helicopter is seen as it comes in to land as US President Donald Trump and US First Lady Melania Trump arrive to attend a welcome ceremony at Buckingham Palace in central London on June 3, 2019, on the first day of their three-day State Visit to the UK. - Britain rolled out the red carpet for US President Donald Trump on June 3 as he arrived in Britain for a state visit already overshadowed by his outspoken remarks on Brexit. (Photo by TOBY MELVILLE / POOL / AFP)