Sir Alex Ferguson has retired as manager of Manchester United. (www.manchestereveningnews.co.uk)
Sir Alex stepped down as United boss yesterday (Wednesday) morning after 26 years at Old Trafford and the club chose the social network to break the news.
The four word tweet caused an even bigger reaction than the death of former Prime Minister Margaret Thatcher in April.
Sir Alex Ferguson retires. #thankyousiralex
— ManUtd_PressOffice (@ManUtd_PO) May 8, 2013
The announcement of the new Pope however on March 13 gained seven million mentions, easily beating Sir Alex.