with 1,000 IDF personnel. Germany and Britain also participated. Since mid 2017, the United States operates an anti-missile system in the Negev region of Southern Israel, which is manned by 120 US Army personnel. It is a facility used by the U.S. inside a larger Mashabim Israeli Air Force base. India India and Israel enjoy strong military and strategic ties. Israeli authorities consider Indian citizens to be the most pro-Israel people in the world. Apart from being Israel's second-largest economic partner in Asia, India is also the largest customer of Israeli arms in the world. In 2006, annual military sales between India and Israel stood at US$900 million. Israeli defense firms had the largest exhibition at the 2009 Aero India show, during which Israel offered several state-of-the art weapons to India. The first major military deal between the two countries was the sale of Israeli Phalcon airborne warning and control system (AWACS) radars to the Indian Air Force in 2004. In March 2009, India and Israel signed a US$1.4 billion deal under which Israel would sell India an advanced air-defense system. India and Israel have also embarked on extensive space cooperation. In 2008, India's ISRO launched Israel's most technologically advanced spy satellite TecSAR. In 2009, India reportedly developed a high-tech spy satellite RISAT-2 with significant assistance from Israel. The satellite was successfully launched by India in April 2009. According to a Los Angeles Times news story the 2008 Mumbai attacks were an attack on the growing India-Israel partnership. It quotes retired Indian Vice Admiral Premvir S. Das thus "Their aim was to... tell the Indians clearly that your growing linkage with Israel is not what you should be doing..." In the past, India and Israel have held numerous joint anti-terror training exercises Germany Germany developed the Dolphin submarine and supplied it to Israel. Two submarines were donated by Germany. The military co-operation has been discreet but mutually profitable: Israeli intelligence, for example, sent captured Warsaw Pact armor to West Germany to be analyzed. The results aided the German development of an anti-tank system. Israel also trained members of GSG 9, a German counter-terrorism and special operations unit. The Israeli Merkava MK IV tank uses a German V12 engine produced under license. In 2008, the website DefenseNews revealed that Germany and Israel had been jointly developing a nuclear warning system, dubbed Operation Bluebird. United Kingdom During a secret operation in 1966,