There have been major delays and cancellations at some of Europe's biggest airports - including London Heathrow - after technical problems brought down some automatic check-in systems. In other news, an elderly British couple, who were held by the Taliban for nearly eight months in Afghanistan, have arrived back in the UK. And several major American companies are said to have advised staff on highly skilled visas not to leave the United States, after President Trump suddenly increased the annual visa fee from one thousand to one hundred thousand dollars.