Yeah, personally i've never liked the studio version of Celestial Voices at the end of Saucerful, but the live versions are superb. Both the Ummagumma and Pompeii versions are entirely different to the studio one, in that they have Gilmour's wonderful vocals instead of a really poor choir-type chanting.

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In 1954 the British Government, in order to maintain the balance of power between East and West, exploded their first atom bomb at Woomera. They failed to contact all of the Aborigine peoples at the time. The Aborigines still call this 'the day of the cloud.'