Officer fights back tears as he pays tribute to friend PC Palmer

Pc Shaun Cartwright, who had been friends with Pc Keith Palmer for more than 10 years, has paid tribute to his friend and fellow officer who was killed in the Westminster attack one year on. Get the latest headlines: http://www.telegraph.co.uk/ Subscribe: http://www.youtube.com/subscription_c... Like us on Facebook:   / telegraph.co.uk   Follow us on Twitter:   / telegraph   Follow us on Google+ https://plus.google.com/1028913550727... Telegraph.co.uk and    / telegraphtv   are websites of The Daily Telegraph, the UK's best-selling quality daily newspaper providing news and analysis on UK and world events, business, sport, lifestyle and culture.