On 23 March 1983 Ronald Reagan publicly announced development of the SDI program.

He is also a critic of an outgrowth of the SDI program, the Bush administration's proposed National Missile Defense.

We put up those test vehicles - the particle beam weapons that were going to be part of the SDI programme.

However, once the SDI program shifted toward theater missile defense in the early 1990s, the system left SDIO control and was transferred to the Air Force.

General Information General information about the SDI program.

The SDI program also held important budget implications.

The PFL insurance program is fully funded by employees' contributions, similar to the SDI program.

I have directed that the SDI programme be refocused on providing protection from limited missile strikes - whatever their source.

The 1983 announcement by the US of their SDI program prompted further political and financial support for the satellite interceptor program.

If Reagan's SDI program remained in place, he said, "we would have to start our own program, which would be tremendously expensive and unnecessary.