curl -v <https://cnn.com>
* Host <http://cnn.com:443|cnn.com:443> was resolved.
* IPv6: (none)
* IPv4: 151.101.67.5, 151.101.195.5, 151.101.131.5, 151.101.3.5
*   Trying 151.101.67.5:443...
* Connected to <http://cnn.com|cnn.com> (151.101.67.5) port 443
* ALPN: curl offers h2,http/1.1
* TLSv1.3 (OUT), TLS handshake, Client hello (1):
* TLSv1.3 (IN), TLS handshake, Server hello (2):
* TLSv1.2 (IN), TLS handshake, Certificate (11):
* TLSv1.2 (OUT), TLS alert, unknown CA (560):
* SSL certificate problem: self-signed certificate
* Closing connection
curl: (60) SSL certificate problem: self-signed certificate
More details here: <https://curl.se/docs/sslcerts.html>

curl failed to verify the legitimacy of the server and therefore could not
establish a secure connection to it. To learn more about this situation and
how to fix it, please visit the web page mentioned above.