Rubin said Iran had achieved “a technological and strategic breakthrough” with its Sejjil, a two-stage, solid propellant missile. On May 20, Iran test-fired the Sejjil 2, which is said by Tehran to have a range of about 2,000 kilometers.

“Based on its demonstrated achievement in solid propulsion and staging, Iran will face no technological challenges” in close to doubling its range with a one-ton warhead, said Rubin, who oversaw development of Israel’s Arrow anti-missile system while running the Jewish state’s missile defense effort from 1991 to 1999.