I'm Carla Zeus at the CNN Center.

Thank you for starting off your week with us.

First story concerns Iran Persia Until 1979 it used to be a monarchy governed by a shop Persian king.

But 40 years ago that Shah was overthrown, enforced in exile and as a result of the Iranian revolution, the nation became a theocratic republic with Islam as its official religion.

One major reason why Iran has been arrival of the United States since around that time is because the U.

S supported the Shah who was overthrown.

But there are other reasons, including the fact that the U.

S, the United Nations and the European Union say Iran is an official sponsor of terrorism.

That's why they've imposed sanctions or penalties on Iran's economy.

As the Middle Eastern country celebrates a revolution milestone this year, it's military is showing off a new ballistic missile weapon that is said to be capable of traveling more than 600 miles on.

Iranian military official called the missiles development and achievement.

But the country's missile program concerns other nations around the world, including the U.

S.

Because Iran's supreme leader has called for the destruction of Israel, a U.

S ally in the region.

Theo return from exile of Ayatollah Khomeini in February 1979 and the overthrow of the US backed Shaw marked the culmination of the Islamic revolution.

Businessman Abdel Chasm Shafei says he organized opposition groups in those days.

40 years later, he believes the revolution produced mixed results when as Ottoman, religiously and ideologically, the revolution achieved its goals, he says.

But economically, due to sanctions and domestic mismanagement, we have not yet reached those goals.

Theo.

Islamic Revolution also an uprising against America's support for the shop.

In late 1979 Iranian students stormed the U.

S embassy in Tehran, capturing and holding hostage more than 50 Americans for more than 400 days.

US.

Iranian relations have never recovered.

Hardliners, still chanting Death to America at Friday prayers in the Iran's supreme leader, recently tried to tone down the rhetoric.

Has that out there we're going to make something clear for us leaders, You said Death to America.

It means death to American rulers.

We have no problems with the American people.

The Trump White House is cracking down on Iran, pulling the US out of the nuclear deal signed by the Obama administration and hitting the country with sanctions that are crippling its economy and causing its currency to plummet.

The U.

S says Iran is a threat to Israel on America's allies in the Middle East and lashed out at Iran's ballistic missile program.

Iran's answer.

A defense expo praising the rockets Iran shows no signs of bowing to American and international pressure.

The country says it will continue to develop its ballistic missile program, which it says is solely for defense purposes.

For the first time, Iran recently released video of one of its underground missile assembly facilities.

40 years after the beginning of the Islamic revolution, the confrontation between the U.

S.

And Iran continues.

Fred Pleitgen, CNN Tehran Second stop This Tuesday is in South America.

We've told you how a collapsing economy is leaving many people in Venezuela hungry and unable to get the hygienic and medical supplies they need Well, help is flowing to Venezuela from nations around the world, but some of it at least, has been stopped at the country's western border with Colombia beginning last Friday.

Two truckloads of food and medicine from the United States were prevented from rolling on the Venezuelan soil.

The country's president, Nicolas Maduro, said Quote, we're not beggars.

And he added that the humanitarian aid is intended to humiliate Venezuela and justify military aggressions.

Analysts say it's possible that the government's afraid that the supplies could be used as a cover for an invasion of Venezuela.

But one Guido, who declared himself the new Venezuelan president in January, said the aid would be let in because it's about saving lives and that the officials who block it are keeping medicines and food from people in need.

As inflation in Venezuela spins out of control, with prices for everyday items soaring beyond what residents can pay, countries like Canada and Germany have pledged millions of dollars to help.

What's unclear is whether the Maduro administration will accept it.

Which of these countries uses a currency called the NuWave O sole, Chile, Peru, Argentina or Brazil?

The new wave of soul is the currency of the South American nation of Peru.

The NuWave O soul has also been a relatively stable currency over the past 10 years.

It's a reflection of Peru's strong economy, one of the best in Latin America.

But though the country's poverty rate has decreased substantially, it's still around 22% meaning over 1/5 of the nation's 31 million people live below the poverty line.

That's part of the reason why illegal gold mining has skyrocketed.

Peru is a major producer of gold, and a lot of the mining there is allowed by the government.

But the kind that's not allowed takes only a few hours.

For someone to learn how to do it can bring them cash quickly.

It's made gold.

Peru's most valuable illegal export in the rainforest is paying the price.

Their illicit to wheel taxi service is known as Los Tigres.

My driver, one of the thousands of young men who have come from all over Peru, lured by an operation that could net $100 a day or get them killed.

We ride for 20 minutes before the lush green begins to thin.

The jungle floor turns to sand half mile further and the rain forest is gone.

It's like we've entered a completely system from jungle, the desert in a matter of feet.

Oh, this didn't exist.

These legs didn't exist.

Nothing, that it was just flat forest like we went through.

This is all men.

Wow!

Oh, my God!

Oh, my God!

And these air All toxic toxic pools.

Now, this is all mining pits that are filled in at birth in a van with green.

They use an old brutal method, merciless on the land, cutting down trees, blasting riverbanks with diesel powered fire hoses, creating a slurry that gets sifted until Eureka, a tiny flake of gold.

Since this land only holds two grams of precious metal per thanh of mud, mercury is needed to pull the gold from the sludge.

And what effect is that Mercury have on living things here, including the people?

Well, it's magic for the mining process, but it's poison for everything else.

Theme Kentucky Derby is said to be the oldest continuously held major sporting event in the U.

S.

The first race was running 18 75 for the second oldest sporting event.

You have to trade in your horse for a dog.

CNN recently visited the Westminster Kennel Club Dog Show, which started over the weekend in New York City.

Every February, the dogs descend upon Manhattan, and it's for the 142nd annual Westminster Kennel Club Dog Show.

We have over 3200 dogs coming this year.

This is the meat breathes.

His name is Teddy.

This is true.

Doblas.

This is a fun time, you know, just to get out and teach people about the breed, like learning about different grades of Daleks.

Have a boxer kissing Booth because I you have the fifth annual Masters Agility Championship going.

It's my first time ever been in.

I've been watching him on TV.

It's just so exciting.

Scene Birth This show is the second longest continuously held sporting event in the United States.

Reason it's been able to maintain that is the fact that it's about dogs.

Man's best friend came to Not like.

So who will win best in show?

Will the Doberman pinch the lead?

Will judges be brought to their period?

Knees are spotted dogs worth of down mentioned or doesn't take a toy to to, well, walk away with victory.

You can greyhound us about this all you want, but if you're wondering why more aren't we telling you It's because results haven't been pointed out yet.

Those will be centered on Tuesday.

I just didn't want you to think we were being malamute on the subject.

I'm Cornelia Zeus and will spring her back with more for you tomorrow.