The Jewish Federation of St. Joseph Valley held a rally against Iran Thursday night.

Residents learned about how the terror-sponsoring country is funded, and how they can prevent indirectly contributing to Iran.

"The basic goal is to raise awareness first of all what Iran is doing as a state sponsored terrorism, secondly their pursuit of nuclear weapons, but most important of all we want to raise awareness what we as individuals can do to help prevent Iran from acquiring nuclear weapons," said Bob Fefferman with the Federation.

The group United Against Nuclear Iran said it is easy to unknowingly support Iran.

"I want them to go home and look at their own investments, see what companies they're investing in that have ties to the government of Iran for example and say to their broker get rid of them," said former Missouri Treasurer Sarah Steelman.

Indirect support is so common some U.S. States unknowingly supported Iran.

Steelman spoke about how she worked to eliminate investing taxpayer money in companies that support Iran.

"When I found that out, I said no, this is not right and we need to stop this. The American people don't want their money helping terrorist around the world, and so we started the first terror-free fund in the state of Missouri," said Steelman.

So far, UANI said it has stopped several prominent U.S. companies from supporting Iran and hopes to stop even more.

"I think we've seen in the last couple weeks and months major fortune 500 companies have taken a responsible action at our urging to discontinue their business with Iran," said David Ibsen with UANI.

Often it's not the companies that are directly writing checks to Iran, but rather their international subsidiaries that are helping the country.

Recently construction equipment manufacturer Caterpillar's Canadian subsidiary Lovat either sold equipment to Iran that was used to make a secret nuclear site or it sold to a dealer that sold to Iran.

Since then Caterpillar has said it will make sure none of its equipment ends up in Iran.

UANI points out it's not just targeting Iran, but also other countries that sponsor terrorism, such as Syria, Sudan and recently Yemen.