What is the fine-grained topic of the following text: Prince Mohammed, also during the course of his trip will be soliciting $35 billion in American investment to accelerate his plan to overhaul Saudi Arabia’s infrastructure — part of his laudable Vision 2030 plan, which sets in motion plans to modernize the kingdom and diversify its source of revenue far away from oil. Only return the topic.
Prince Mohammed soliciting American investment for Saudi Arabia's Vision 2030 plan.