But some day the threat may prove to be real – that is, either the Government or private industry may have to pay up or suffer the effects of a nuclear detonation or nuclear radiation. We list six types of threat – two as highly improbable, four reasonably credible. The highly improbable are the detonation of a home-made bomb made from stolen weapons-grade materials or the detonation of a ready-made nuclear bomb stolen from a military ordnance depot: the credible are the dispersion of radio-active material other than plutonium, the release of hi-jacked radio-active materials from a spent fuel shipment, the detonation of a conventional high explosive salted with strontium-ninety, krypton-eighty-five, cesium-one-three-seven or even plutonium itself, or simply by the release of plutonium for contamination purposes.’
‘From the business-like way those criminals behaved in San Ruffino it might be that they mean business.’
‘The time has to come – we know that. This may be the time we receive a threat that really is a threat. We have made preparations, formulated in nineteen-seventy-five. “Nuclear Blackmail Emergency Response Plan for the State of California”, it’s called. The FBI have the overallcontrol of the investigation. They can call on as many Federal, State and local agencies as they wish – including, of course, the police. They can call on nuclear experts from such places as Donner in Berkeley and Lawrence at Livermore. Search and decontamination teams and medical teams, headed by doctors who specialize in radiology, are immediately available as is the Air Force to carry those teams anywhere in the State. We at ERDA have the responsibility of assessing the validity of the threat.’
‘How’s that done?’
‘Primarily on checking with the government’s computerized system that determines very quickly if unexpected amounts of fissionable material is missing.’
‘Well, Dr Durrer, in this case we know already how much is missing so we don’t have to ask the computers. Just as well; I believe the computers are useless anyway.’
For the second time Durrer removed his pince-nez. ‘Who told you this?’
Ryder looked vague. ‘I don’t remember. It was some time ago.’ Jeff kept his smile under covers. Sure, it was some time ago. It must have been almost half an hour since Ferguson had told him. Durrer looked at him thoughtfully then clearly decided there was no point in pursuing the subject. Ryder went on, addressing himself to Mahler. ‘I’d like to be assigned to this investigation. I’d look forward to working under Major Dunne.’
Donahure smiled, not exactly an evil smile, just that of a man savouring the passing moment. His complexion had reverted to its customary mottled red. He said: ‘No way.’
Ryder looked at him. His expression wasn’t encouraging. ‘I have a very personal interest in this. Forgotten?’
‘There’ll be no discussion, Sergeant. As a policeman, you take orders from only one person in this county and that’s me.’
‘As a policeman.’ Donahure looked at him in sudden uncertainty.
Dunne said: ‘I’d appreciate having Sergeant Ryder working with me. Your most experienced man and your best in Intelligence – and with the best arrest record in the county – any county; come to that.’
‘That’s his trouble. Arrest-happy. Trigger-happy. Violent. Unstable if he was emotionally involved, as he would be in a case like this.’ Donahure tried to assume the expression of pious respectability but he was attempting the impossible. ‘Can’t have the good name of my force brought into disrepute.’
‘Jesus!’ It was Ryder’s only comment.
Dunne was mildly persistent. ‘I’d still like to have him.’
‘No. And with respects, I needn’t remind you that the authority of the FBI stops on the other side of that door. It’s for your own sake, Major Dunne. He’s a dangerous man to have around in a delicate situation like this.’
‘Kidnapping