Russia has agreed to complete its years-old sale of advanced S-300 surface-to-air missiles to Iran. What does this mean? Well, it does not make Iran’s airspace invulnerable, but it will be a significant upgrade with the potential to deter Israel from launching an air raid against Iranian nuclear sites. In a nice, illustrated piece the Washington Post explains what the S-300 system is.
Credit for the piece goes to the Washington Post graphics department.