curl failed with "NSS error -5961" to get a content from https site.

Solution In Progress - Updated -

Issue

The curl command failed with the following error.

$ curl -vvv https://example.com/index.html
* About to connect() to example.com port 443 (#0)
*   Trying 10.0.0.1... connected
* Connected to example.com (10.0.0.1) port 443 (#0)
* Initializing NSS with certpath: sql:/etc/pki/nssdb
*   CAfile: /etc/pki/tls/certs/ca-bundle.crt
  CApath: none
* NSS error -5961
* Closing connection #0
* SSL connect error
curl: (35) SSL connect error

Environment

Red Hat Enterprise Linux 6

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