From ridiff.com "Do Pakistan and China have it?
Neither have it. China was refused the Phalcon in 2000 even after they had paid an advance because of American objections. After India signed the agreement last week Pakistan has threatened to take 'appropriate steps' to match Indian capabilities.
Why is US permission so important for buying the Israeli manufactured product?
America is Israel's key ally and a collaborator in Israel's development of several cutting edge military technologies. The Israeli Aircraft Industries, which produces the Phalcon, has an agreement with some European and US firms, including Raytheon for further research, development and marketing of the Phalcon. India too was given the Phalcon only after US permission. The US had threatened to withdraw financial assistance to Israel if it went ahead and fitted the system on a Chinese plane, which had landed in Israel in 2000."