Read this and answer the question. If the question is unanswerable, say "unanswerable".

Robert Fisk, seven times British International Journalist of the Year, resigned as foreign correspondent in 1988 over what he saw as "political censorship" of his article on the shooting-down of Iran Air Flight 655 in July 1988. He wrote in detail about his reasons for resigning from the paper due to meddling with his stories, and the paper's pro-Israel stance.

The foreign correspondent for The Times who resigned in 1988, resigned for what reason?
political censorship