Kenyan authorities are saying that they will start on his journey back to Britain tonight, leaving at 7 o'clock.

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The troops went out about 7 o'clock at night and came back at about 11 o'clock.

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"After 7 or 8 o'clock at night it is difficult to walk around, " says Bezuidenhout.

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Evidence of past explosions is revealed in the image - huge lobes of 20-million-degree Celsius gas (the red loops in the image at approximately the 2 o'clock and 7 o'clock positions) that extend over dozens of light-years on either side of the black hole.

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