The Prince of Wales has paid tribute to journalists working to ensure the public has the "impartial truth" from conflict zones as he marked the 90th anniversary of BBC World Service. Prince Charles and the Duchess of Cornwall praised BBC staff for their work covering wars in Ukraine and Afghanistan, during a visit to the corporation, and Charles told broadcasters Lyse Doucet and Clive Myrie "you're incredible, but it can't be easy". During the visit, Charles appeared surprised when a young Afghan woman, who was part of an emergency evacuation of BBC staff from Kabul last August, thanked him for "saving my life". Report by Brooksl. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn