Read this: One of the paper's best known front pages, published on 4 May 1982, commemorated the torpedoing of the Argentine ship the General Belgrano by running the story under the headline "GOTCHA". At MacKenzie's insistence, and against the wishes of Murdoch (the mogul was present because almost all the journalists were on strike), the headline was changed for later editions after the extent of Argentinian casualties became known. John Shirley, a reporter for The Sunday Times, witnessed copies of this edition of The Sun being thrown overboard by sailors and marines on HMS Fearless.
Now answer this question, if there is an answer (If it cannot be answered, return "unanswerable"): Why did The Sun change the wording of the headline?
the extent of Argentinian casualties became known