Bing

Why doesn't www.bing.com redirect from HTTP to HTTPS?

On occasion, I’ve noticed the following HTTP referer when going through my server logs: http://www.bing.com/search?q=your+search&go=Search (notice the HTTP part). I thought it would be interesting to see if this HTTP referer was sent from Microsoft’s search engine as a result of someone performing a search over an unencrypted HTTP connection.