Delegates from 28 nations, including the US and China, agreed on Wednesday to work together to contain the potentially "catastrophic" risks posed by galloping advances in artificial intelligence. The first international AI Safety Summit, held at a former codebreaking spy base near London, focused on cutting-edge "frontier" AI that some scientists warn could pose a risk to humanity's very existence. British Prime Minister Rishi Sunak said the declaration was "a landmark achievement that sees the world's greatest AI powers agree on the urgency behind understanding the risks of AI – helping ensure the long-term future of our children and grandchildren."...