Tuesday, 17 September, 2002, 07:55 GMT 08:55 UK Door shuts on pyramid's mysteries A fibre optic camera was inserted inside the door Hopes of unlocking the secrets of the Pharaohs have hit an obstacle after a robot sent into the heart of Egypt's Great Pyramid in Giza has found its way barred. Scientists will study the footage and prepare for another expedition With audiences watching on live television, the miniature robot - dubbed the Pyramid Rover - crawled about 65 metres (71 yards) up a narrow tunnel to explore a mysterious shaft blocked by a limestone door. When it got...