Notes to self

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Done everything except for:

Passing over Quito, Ecuador, towards the end of his fifth orbit, Schirra was asked by the capsule communicator if he had any message to pass on "in Spanish, to the folks down here", and he made some comments on how beautiful the country appeared from orbit[44]
He remained aboard for three days of medical tests and debriefing before disembarking, whilst the spacecraft was offloaded at Midway Island and transferred to an aircraft for further transport.[50] It was returned to Cape Canaveral for analysis, with the long-term intention of putting it on permanent display.[51]
Schirra's post-flight report noted the "fireflies" seen on the previous two missions, and emphasised the remarkable visual effect of the thick band of the atmosphere visible around the horizon.[61]

See also:

Source doesn't call them "fireflies"
Purpose of lights experiment (test viewing ground)
Project Mercury had twice accomplished the mission for which it was

designed, but in so doing its end had become the means for further ends. - TNO, 460