If you are a citizen of a country in the U.S Visa Waiver Program, you must apply for an I Visa to engage in journalism activities in the USA.
If you travel without the I Visa or any valid visa, you may be denied admission by the Department of Homeland Security (DHS). Please note that if you travel with a visa that doesn’t have journalism under permitted activities, you cannot gather the information or report news to an audience in their home country.
The only countries/territories exempt from applying for an I Visa are Canada and Bermuda.