openssl s_client -showcerts -connect perlmonks.org:443

CONNECTED(00000264)
depth=2 C = US, ST = New Jersey, L = Jersey City, O = The USERTRUST Network, CN = USERTrust RSA Certification Authority
verify error:num=20:unable to get local issuer certificate
---
Certificate chain
 0 s:                                                    <------ weird to be empty
   i:/C=US/ST=New Jersey/L=Jersey City/O=The USERTRUST Network/CN=USERTrust RSA Domain Validation Secure Server CA
...