US National Security Adviser HR McMaster has said, President Donald Trump intends to strengthen alliances during his first overseas tour, which begins next week. <br/><br/>Mr McMaster said at the daily White House briefing that the visits to Saudi Arabia, Israel, the Vatican, Belgium and Italy later this month will show the President's engagement with leaders around the world. <br/><br/>He said, the trip has three core purposes – to reaffirm America's global leadership, to continue building key relationships with world leaders and to broadcast a message of unity to Washington's friends and to the faithful of three of the world's greatest religions. <br/>