Trump signs executive orders to boost coal, a reliable but polluting resource

Donald Trump has signed a series of executive orders aimed at boosting the struggling coal industry - the industry reliable but a polluting energy source that has long been in decline. Trump using his emergency authority to allow some older coal-fired power plants set for retirement to keep producing electricity to meet rising U.S. power demand amid growth for example in data centers, artificial intelligence and electric cars. Siobhan Silk reports.