‘Yes, but we still have this problem.’ Saul called up an image of the plane that had dropped out of formation first. It was once again rising through the upper atmosphere. ‘But we have time,’ he continued. ‘It’ll have to do a full orbit of Earth’ – he ran some calculations based on the fuel the plane had available and its optimum approach speed – ‘which gives us twenty-two hours.’

‘Can you hit it with some more satellites?’

‘No, they’ll be watching out for that now.’ Saul turned his chair so as to face both Braddock and Hannah. ‘We’ll have to kill them near or actually inside the station, if we’re still alive by then.’

15

Drive to Fusion

When, back in 2035, the first commercial fusion reactor went online, scientists speculated that they were now just ten years away from using the same technology to build a fusion drive. It was to prove, however, a lot more difficult to develop than they supposed. Within ten years, the first prototype was assembled in orbit, then towed out from Earth for test firing. It worked for just six tenths of a second before sputtering out, yet it took the engineers a further five years to find out why. The problem was gravity. On Earth, the engine tolerances were correct, but once away from gravity the device distorted. In fact the engine was far too sensitive, since the slightest misalignment could shut it down. It took a further ten years to design and build a more robust machine, and only five years after its first successful test, the next massive fusion engine was being installed in the steadily growing hull of the first Traveller spacecraft.

Chang and the Saberhagen twins ensured that everyone they could communicate with was made as safe as possible. They found every available spacesuit or survival suit and assigned them, before ensconcing those people still without suits in the safer, inner areas of the living accommodation – the sections that could be sealed with bulkhead doors. But in total that amounted to less than eight hundred people, because the moment the three of them tried opening com with those outside the area Saul controlled, Smith shut the communication down. Just as he seemed to be shutting down so much else, for all construction and maintenance work aboard Argus had now ceased. Even the ore carriers were no longer running between the station itself and the smelter plants, which had started folding up and closing their huge mirrors.

‘You’ve now lost your chief security force here,’ Saul observed, ‘and now only one of those space planes looks like having a chance of ever getting here.’