Sigma 7 Readied for FlightPersonnel in Hangar S at Cape Canaveral, Florida, prepare Wally Schirra's Mercury 8 capsule nicknamed "Sigma 7" for delivery to the launch pad to be mated to the Atlas launch vehicle.Read More Facebook Pinterest X LinkedIn Email https://www.nasa.gov/image-detail/sigma-7-readied-flight/Copy URL to clipboard> DownloadShareSize1041x1303px