A DOCUMENT linking Margaret Thatcher to a US corruption probe is so explosive civil servants have been asked to ensure it remains "sealed". The 79-year-old former Premier is said to have met Congressman Tom DeLay in Britain while he was on a suspected favours-for-freebies scam. In return for his free holiday, DeLay - who resigned as Republican leader of Congress last week after being accused of laundering political funds - allegedly backed legislation favourable to lobby groups...read on (hat tip Raw Story)