Were cancer rates among those witnesses much higher than in the general population? (Note that the goggles really do nothing when it comes to cancer, so that bit is irrelevant.)
The immediate radiation dose from a nuclear explosion is generally low. It's the fallout that gets you, hours or days later. Even then, the risk is acute poisoning, not so much long-term cancer risk.
Were cancer rates among those witnesses much higher than in the general population? (Note that the goggles really do nothing when it comes to cancer, so that bit is irrelevant.)
The immediate radiation dose from a nuclear explosion is generally low. It's the fallout that gets you, hours or days later. Even then, the risk is acute poisoning, not so much long-term cancer risk.