> My initial reaction would be to use a different rare element. However, a rare element might draw more scrutiny to the casual observer. Then again, the potenti

> My initial reaction would be to use a different rare element. However, a rare element might draw more scrutiny to the casual observer. Then again, the potential for confusion is incredibly high. Interesting spycraft Worth noting (unless someone else already did) that the UK program that technically started before the Manhattan Project was called 'Tube Alloys'.