Saudi Arabia's crown prince, Mohammed bin Salman, has announced that the kingdom intends to invest $600 billion in the United States over the next four years. The announcement came after President Donald Trump revealed that he plans to return to Saudi Arabia as his first foreign trip. The crown prince stated that the kingdom aims to broaden its investments and trade with the US, potentially beyond the $600 billion mark. The specific details of these investments and trade agreements have not been disclosed.