=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 200 OK
Date: Mon, 29 Nov 2021 19:19:06 GMT
Server: Apache
Last-Modified: Mon, 09 Jul 2007 22:41:10 GMT
ETag: &quot;235-434dc575ced80&quot;
Accept-Ranges: bytes
Content-Length: 565
Connection: close
Content-Type: application/vnd.google-earth.kmz

Request headers
================
HEAD /~isenburg/googleearth/tiles/saint_helens.kmz HTTP/1.1
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)
Host: www.cs.unc.edu
Accept: */*
Referer: http://web-marketing.zako.org
Connection: close


Link is valid.