=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 301 Moved Permanently
Location: https://www.cato.org/us-constitution/
Content-Length: 0
Connection: close

HTTP/1.1 301 Moved Permanently
Content-Type: text/html; charset=UTF-8
Expires: Sun, 19 Nov 1978 05:00:00 GMT
X-Content-Type-Options: nosniff
Location: https://www.cato.org/us-constitution
Strict-Transport-Security: max-age=31536000; preload
Cache-Control: no-cache
Content-Length: 0
Accept-Ranges: bytes
Date: Mon, 29 Jul 2019 01:09:30 GMT
Age: 0
Connection: close
X-Served-By: cache-iad2139-IAD, cache-bwi5040-BWI
X-Cache: MISS, MISS
X-Cache-Hits: 0, 0
X-Timer: S1564362570.316438,VS0,VE93
Vary: Cookie,fastly-ssl
Set-Cookie: visid_incap_1012442=Ns3F4N/+S8K49Xw8LCL4VElHPl0AAAAAQUIPAAAAAACjMIbaup4XIe6pCIAIO6S6; expires=Mon, 27 Jul 2020 08:52:02 GMT; path=/; Domain=.cato.org
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X-CDN: Incapsula

HTTP/1.1 200 OK
Content-Type: text/html; charset=utf-8
X-Content-Type-Options: nosniff
Etag: &quot;1564362570-0&quot;
Content-Language: en
Last-Modified: Mon, 29 Jul 2019 01:09:30 GMT
Expires: Sun, 19 Nov 1978 05:00:00 GMT
Strict-Transport-Security: max-age=31536000; preload
Cache-Control: no-cache
Content-Length: 52598
Accept-Ranges: bytes
Date: Mon, 29 Jul 2019 01:09:30 GMT
Age: 0
Connection: close
X-Served-By: cache-iad2127-IAD, cache-bwi5051-BWI
X-Cache: MISS, MISS
X-Cache-Hits: 0, 0
X-Timer: S1564362570.452598,VS0,VE324
Vary: Accept-Encoding, Cookie,fastly-ssl
Set-Cookie: visid_incap_1012442=gl2w3nBOTdaMRtbbSJiDi0lHPl0AAAAAQUIPAAAAAAC2x5p+D7MdUyMWl/1JA5rY; expires=Mon, 27 Jul 2020 08:52:02 GMT; path=/; Domain=.cato.org
Set-Cookie: nlbi_1012442=z1XrRUF99wfIkcF4mIG3tAAAAACtHAFi6MYccEz1+Q8GmuiB; path=/; Domain=.cato.org
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X-Iinfo: 4-92657185-92657198 NNNN CT(0 0 0) RT(1564362569529 40) q(0 0 0 -1) r(4 4) U5
X-CDN: Incapsula

Request headers
================
HEAD /us-constitution HTTP/1.1
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
Host: www.cato.org
Accept: */*
Referer: https://ssdp.org
Connection: close


Link is valid.