And

a new

defiant challenge from that country,

a country filled with nuclear ambition. And once again, ABC's David Muir’s reporting live from Tehran tonight,

David.

Diane,

good evening again from Iran this evening and we began with that new UN report. The inspectors who say they’ve discovered advanced centrifuges installed at one of Iran's main nuclear facilities.

They say it's proof that Iran can now speed up the process to a nuclear weapon.

Iran of course say it has no such ambition.

But the state department,

Diane,

reacting quickly tonight,

calling this further escalation,a provocative step just days before the U.S. and Iran are back at the negotiating table.

And today right here,

you’ll hear from the Iranian people we spoke with today,

many of whom say they are the ones caught in the middle.

Allowed rare access to the streets here,

today we went in search of one of the biggest pharmacies in central Tehran,

having heard life-breathing medicine is now running out.

Dr. Corula Glami runs the pharmacy. “Right now we have shortage, almost of every category of the medicine.”

And he points straight to those tightening U.S. Sanctions, meant to force Iran’s leaders to change course on their nuclear program, now affecting everyone. Even patients buying medicine, all of it, he says, because money in and out of Iran is nearly frozen. 

--But because of that money flow, it has stopped some of the drugs from coming in?

--Yes, because you’re a manufacturer of drug, you want your money. When I can’t pay you, how can you send the medicine to me?

--And that’s all because of the sanctions?

--That’s right. 

Cameras are rarely allowed free reign in Iran, but we ask him to allow us inside the pharmacy and he takes us.

--Is this crowd typical, the size of this crowd?

Immediately we see the lines as we sneak our way behind the counter to the back, where not only are they low on many medications, they have run out of several cancer drugs. 

--Colon cancer.

--Then you don’t have. 

--That we don’t have, 

-And what do you give instead?

--We don’t have much.

And by mid-day alone.

--How many people have been asking for it?

--40 people.

--40 people today have asked for that one cancer drug alone? And on the other side of the counter, the urgency in their faces. This man shows us the prescription for a loved one with leukemia. He took a cab from 2 hours away. When we did the math, skyrocketing inflation here, that ride cost more than 500 dollars. 

--And you have gone to how many pharmacies?

--Over 20.

And while we were there, he finally made his way to the window ,where he is told there is none left. Come back Saturday.

--You will go home with no medicine? 

What can I do? He asks. 

And as the sun set in Tehran tonight, the sanctions meant to force the supreme leader whose revered image hovers over this city, into backing down any nuclear ambitions are now forcing the people here to pay the price too. 

We should point out that the government did not take us to that pharmacy

today.

In fact,

we had to push to get our cameras inside.

Police were waiting for us afterwards,

checking for our paper work to make sure not only we had been invited into and more importantly,

our camera,

Dianne.

And one another thing that struck me is that many the customers and patients who were there,

off camera. When we would ask them who is to blame,

often they would say we don't know who is to blame,

but we should point out that we are the ones feel as if we are trapped in the middle of this standoff.