from 1962 to 2011. The vice minister, Abdulrahman bin Abdulaziz, was his full brother and served until November 2011. His oldest son, Khalid bin Sultan, was appointed assistant minister in 2001 and was in office until April 2013. Defense spending Spending on defense and security has increased significantly since the mid-1990s and was about US$67 billion in 2013. Saudi Arabia ranks among the top five nations in the world in government spending for its military, representing about 9% of GDP in 2013. Its modern, high-technology arsenal makes Saudi Arabia among the world's most densely armed nations, with its military equipment being supplied primarily by the United States, France, and Britain. According to SIPRI, in 2010–14 Saudi Arabia became the world's second largest arms importer, receiving four times more major arms than in 2005–2009. Major imports in 2010–14 included 45 combat aircraft from the United Kingdom, 38 combat helicopters from the U.S., 4 tanker aircraft from Spain and over 600 armored vehicles from Canada. Saudi Arabia has a long list of outstanding orders for arms, including 27 more combat aircraft from the United Kingdom, 154 combat aircraft from the U.S. and a large number of armoured vehicles from Canada. The United States sold more than $80 billion in military hardware between 1951 and 2006 to the Saudi military. In comparison, the Israel Defense Forces received $53.6 billion in U.S. military grants between 1949 and 2007. On 20 October 2010, U.S. State Department notified Congress of its intention to make the biggest arms sale in American history—an estimated $60.5 billion purchase by the Kingdom of Saudi Arabia. The package represented a considerable improvement in the offensive capability of the Saudi armed forces. The United States emphasized that the arms transfer would increase "interoperability" with U.S. forces. In the Persian Gulf War, having U.S.-trained Saudi Arabian forces, along with military installations built to U.S. specifications, allowed the U.S. military to deploy in a comfortable and familiar battle environment. This new deal would increase these capabilities, as an advanced American military infrastructure is about to be built. The U.S. government was also in talks with Saudi Arabia about the potential sale of advanced naval and missile-defense upgrades. The United Kingdom has also been a major supplier of military equipment to Saudi Arabia since 1965. Canada recently won a contract worth at least US$10 billion to supply the Saudi Arabian army with armored military vehicles.