In America they'd become very anxious in getting a licence to do this work, so they would settle on anything as long as they got a licence. So we... so an enormous system of categories got invented, and which had been worked out by scientists and which was ludicrous because the dangers  — and all the dangers were conjectural, that is you thought they were dangers — were dependent on where the DNA came from, all right. So, clearly malaria is a dangerous disease. Therefore they said if you clone malaria you have to do this under a high category, without taking into consideration what it would take to reconstitute malaria from its component DNA molecules. On that grounds, you see, you would have to clone lion DNA at a much higher category than, say, pussy cat DNA, because clearly lions are more dangerous than pussy cats. And so this kind of uncanny never-neverland which... which just made no sense of anything became the way in which one did these experiments over the next few years.