=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 200 OK
Cache-Control: no-cache
Pragma: no-cache
Content-Length: 72299
Content-Type: text/html; charset=utf-8
Expires: -1
Server: Microsoft-IIS/10.0
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X-AspNet-Version: 4.0.30319
Set-Cookie: ASP.NET_SessionId=s4daamhtaz3rvm3pms1q0fb2; path=/; HttpOnly
X-Powered-By: ASP.NET
Date: Tue, 06 Aug 2019 13:31:45 GMT
Connection: close
Set-Cookie: visid_incap_203468=ee23M2vNTzqUlPO63QgXg0CBSV0AAAAAQUIPAAAAAABy5xo1Fj6fhISQg2ZQyXgG; expires=Wed, 05 Aug 2020 12:12:14 GMT; path=/; Domain=.spie.org
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X-CDN: Incapsula

Request headers
================
HEAD /membership/explore-membership/fellows?SSO=1 HTTP/1.1
Host: spie.org
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36
Accept: */*
Referer: https://bme.fiu.edu
Connection: close


Link is valid.