Australia–United States relations Minister for Defence, US Secretary of Defense and US Secretary of State. The first Australian visit by a serving United States President was that of Lyndon B. Johnson in 1966 to seek support for Australia's ongoing involvement in the Vietnam War. Australia had previously sent advisers and combat troops to Vietnam. In 1992, George H. W. Bush was the first of four US presidents to address a joint meeting of the Australian Parliament. Australia's Prime Minister, Kevin Rudd, ratified the Kyoto Protocol on 3 December 2007, leaving the United States and Canada as the last major industrial nations not to
Ngo Dinh Diem presidential visit to Australia with the Catholic Archbishop of Melbourne Daniel Mannix, who was well known for his political power and advocacy in Australia. The next morning, before departing for Sydney, Diem inspected a textile factory in the inner-northern suburb of Carlton and visited several large-scale public housing estates. At the time, Australia was undergoing a post-World War II population boom and was dealing with housing pressures, an issue that was also confronting South Vietnam following the large influx of northern refugees after the partition in 1954. The guard of honour and a 21-gun salute that Diem received at Parliament House was repeated in