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It does mean penetration but it doesn't mean it's a catastrophic penetration, there's a certain size of penetration that is supportable. There's an emergency oxygen package on the suit that would feed it for a while. When we talk about EVA risk, it's generally around 1 in 2,700, so that's considered the risk of having some size of a penetration over the course over the duration of the six and a half hour EVA.