Those are called San Francisco Slippers, sir.
NRO
@NatReconOfc
#OTD in 1967, the last of the Gambit 1 satellites lifted off from @SLDelta30
. Equipped with a high resolution KH-7 camera system, Gambit 1 helped initiate the next 60+ years of imaging capabilities. 🚀
https://twitter.com/NatReconOfc/status/1533101362711609344