The United States was about to announce a deal that would put a stop to North Korea's uranium enrichment program when it was announced that the country's leader, Kim Jong Il, had died, a senior U.S. official told CBS on Tuesday. The Obama administration, according to the official, was due to announce that the U.S. would make a large donation of food aid to North Korea, and in turn North Korea was to announce the suspension of its controversial uranium enrichment program.