What is the US Homeland Security Secretary's new initiative regarding illegal aliens?

US Homeland Security Secretary Kristi Noem has announced a multi-million dollar advertising campaign targeting illegal aliens in the United States. The campaign explicitly warns individuals who are in the country illegally to leave voluntarily or face deportation consequences. This initiative represents a significant policy enforcement action within the current administration's approach to immigration. The substantial financial investment in this campaign indicates the government's serious commitment to addressing unauthorized immigration through both communication and enforcement measures.