Afghanistan War. While Gillard sent her condolences to the American people and the President for the American casualties in Afghanistan Gillard travelled to the United States in March 2011 to mark the 60th Anniversary of the ANZUS Alliance and was invited to address the United States Congress. Gillard made her first visit to Washington as Prime Minister on 5 March 2011. She held meetings with President Barack Obama, Secretary of State Hillary Clinton, Treasury Secretary Timothy Geithner and UN Secretary General Ban Ki-moon. She also met with Michelle Obama and John McCain. Gillard, addressed a joint session of the United States Congress, the fourth Australian leader to do and first foreign dignitary to address the 112th congress. In April 2011, Gillard embarked on a North Asia trip, promoting closer military, economic and trade ties. Her visit to Japan was the first by a foreign dignitary after the devastating earthquake and tsunami. South Korea and China were also part of her trip. Gillard was the first foreign leader to address the Parliament of New Zealand. In Commonwealth relations, Gillard represented Australia at the Wedding of Prince William and Catherine Middleton in London in April 2011 and hosted the Commonwealth Heads of Government Meeting (CHOGM) in Perth in October of that year. The Perth CHOGM saw the historic announcement, by Gillard and British Prime Minister David Cameron, of changes to the succession laws regarding to thrones of the Commonwealth realms, overturning rules privileging male over female heirs to the line of succession and removing a ban on Roman Catholic consorts. In late 2011, the Gillard government reversed the Rudd government's policy of blocking uranium sales to India for not being a signatory to the Nuclear Non-Proliferation Treaty. Tensions between Rudd and Gillard culminated in the Australian Labor Party leadership spill, 2012. On 23 February 2012, Rudd was replaced as Minister for Foreign Affairs by Craig Emerson (on an acting basis), and then by former NSW Premier and new Senator Bob Carr on 13 March. Outlining his views on managing Australia's important relationships with China and the United States, Carr said: In another early foray into his new portfolio which proved controversial, Carr threatened sanctions against Papua New Guinea in the event of delayed elections there. Gillard toured India in October, seeking to strengthen ties. On 19 October 2012, Australia secured election to a seat as a Non-Permanent Member of the United Nations