Israeli Arrow Missile
When I was working on missile proliferation at State under the George H. W. Bush administration, around 1990 the US began cooperating with Israel on the Arrow anti-missile missile. At that time the US was still a party to the Anti-Ballistic Missile Treaty, which prevented the US from working on strategic ABMs. In theory the Arrow was exempted because it was intended for defense against smaller, shorter-range missiles. However, there was concern that the US was using the Israelis to do research on ABMs that would have been prohibited for the US to do under the ABM treaty. Now that George W. Bush has abrogated US adherence to the ABM treaty in 2001, the ABM treaty is no longer an issue. Hopefully the US gets something out of this cooperation with Israel and it is not just a one way street with all the technology flowing from the US to Israel. Israel is so advanced technologically they definitely could contribute, if they are willing to.