are manufactured and maintained in the United States) to the Russian Federation as part of a deal to encourage Russia to ratify the New START Treaty. Professor Malcolm Chalmers of the Royal United Services Institute for Defence and Security Studies speculated that serial numbers could undermine Britain's non-verification policy by providing Russia "with another data point to gauge the size of the British arsenal". On May 25, 2011, during his official visit to the UK, Obama reaffirmed the relationship between the United Kingdom and the United States of America in an address to Parliament at Westminster Hall. Amongst other points, Obama stated: "I've come here today to reaffirm one of the oldest; one of the strongest alliances the World has ever known. It's long been said that the United States and the United Kingdom share a special relationship." In the final days before the Scottish independence referendum in September 2014, Obama announced in public the vested interest of the United States of America in enjoying the continued partnership with a 'strong and united' UK which he described as "one of the closest allies we will ever have". During a joint press conference with Prime Minister Theresa May, Obama stated "The bottom line is, is that we don't have a stronger partner anywhere in the world than the United Kingdom." Trump administration 2017–2021 President Donald Trump and British Prime Minister Theresa May aimed to continue the United Kingdom–United States special relationship. May was the first foreign leader Trump hosted in Washington after taking office and UKIP leader Nigel Farage was the first foreign politician Trump met with after winning the presidential election, when he was still President-elect. However, Trump was the subject of popular protests in Britain even before he took office, particularly because of his anti-immigration proposals, misogyny and racism. During his presidency there were protests when he was inaugurated, when he announced his first immigration ban on citizens from certain Muslim countries, and when he said he would recognize Jerusalem as the capital of Israel. On June 4, 2017, Trump responded to a terror attack on London Bridge by attacking London Mayor Sadiq Khan for saying that there "was no reason to be alarmed". The comments were condemned by Khan who stated that his remarks were deliberately taken out of context in that he was referring to an increased police presence in the days after the attack, which should