A successful joint exercise carried out Friday, Feb. 10, demonstrated the interoperability of the US Aegis and Israel's Arrow 4 ballistic missile defense systems and, most importantly, of their radar systems: the two US AN/TPY-2 X-band stations in Israel's Negev and Turkey's Kurecik air base, and Israel's new EL/M-2080 Super Green Pine.DEBKAfile's military sources report the test proved to be a key milestone in the development of the US missile shield's Middle East capabilities ahead of a potential war with Iran.