@Tomyris
We are taking the thread off topic so this is my last comment in the matter.
I will say this again, it is not up to you and I what happens in Iran. The Iranian people needed sanctions relief, oil prices may reduce in the beginning but overtime they will go up again. Sanction removal will not just help the oil sector but will seriously cause a boom in Iranian economy if the correct management is applied.
Also, I told you this before many times. You keep saying Iran "needs" weapons for deterrence. Deterrence against who?
Nobody will attack Iran, Iran already has deterrence due to it own indigenous military. Iran will in time buy/invest in technology for airforce. Airforce is the only sector Iran needs help in. 5 years is nothing. If Iran orders fighter planes, by the time they're ready to be delivered, the 5 years is over.
You have the right to be suspicious. But understand the reason the US had to make concessions is because they have
no choice. The sanctions could not have been kept in place for ever because countries (Japan, China, Korea,India etc) were being hurt by them and at some point, the sanctions regime would have fallen apart and at the same time, Iranian nuclear program kept on growing. Thus, the Americans had no choice but to negotiate and make these concessions. It is important to understand, the reason why the arms embargo had to be lifted is because they are part of the nuclear sanctions! Therefore, the American had no choice but to lift them, the best they could do is delay their lifting by 5 years, which they did. China and Russia wanted them lifted immediately.
Anyway, this thread is about airdefence so we should not take it offtopic.