On Feb 24, 2:02*pm, "Dr.Colon Oscopy"
wrote:
Structure looks pretty rugged, but "spaceglass" is just that. *I
haven't seen a lot of info on the retractable window covers. *They
appear to be rather thick, (crushable by design? ) and I'm wondering
as to reason for this?. * I do not think that the covers are there for
a pressure seal as well as the design does not look robust enough for
this * I haven't seen any protocol s on what needs to be done in case
of a threat to the Cupola?

The cupola can be sealed off from the rest of the node by shutting the
hatch.