President Medvedev has announced that the Sale of S-300 surface to air missiles to Iran.

Russia has always taken a minimalist approach to obeying UN sanctions regarding the Iranian nuclear, so this is a big deal, particularly since these missiles, with their 400+ km detection range, end up as a formidable area defense system against conventional aircraft, and a formidable point defense system against stealthy targets, at least to the degree that my wild assed guess regarding detection range are justified.