All of the AMD64 links to download the netinst Debian packages have failed all day:
Not Found
The requested URL /debian-cd/current/amd64/iso-cd/debian-9.2.0-amd64-netinst.iso was not found on this server.
Apache/2.4.26 (Unix) Server at cdimage.debian.org Port 443
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Stephen W McDonnell
1325 South First Street
Louisville, KY 40208
502-558-0475