Reports of Iran Buy of SA-20 Systems

Needless to say, this is something that would concern any country that might be considering an air strike at their nuclear facilities.

The S-300 (SA-20) is a very capable system, with the S-400 (SA-21), which is apparently on offer for export, with no orders yet, even more so.

I ran the numbers on detection ranges about a year ago, using nothing but my basic understanding of physics, and the presence of either the S-300 or S-400 would concern me if I were doing mission planning.