Kevin Dietsch | Getty Images U.S. President Donald Trump said in a social media post on Saturday that he plans to appoint a new artificial intelligence adviser, known as an "AI czar," and create an "AI force," though he did not provide details about either initiative or how they would be implemented. Fears are growing in Washington among lawmakers about the risks AI technology poses to humans and property. Earlier this month, former Anthropic researcher Jacob Coxon said that "people building AI earnestly believe that it could kill us all by the end of the decade." Trump has repeatedly downplayed…