Elon Musk, the world's richest man, is known for his key roles in SpaceX and Tesla. He recently visited Israel and expressed his concern over the conflict and the killings of civilians. Musk has also become involved in US politics, supporting Donald Trump and planning to co-lead Trump's Department of Government Efficiency advisory board. He aims to slash $2 trillion in federal spending and recommends pausing certain regulations. With Republicans in control, his recommendations may have an easier path to passage.