A photograph showing a United State Marine's homecoming was posted to a public Facebook page on Saturday evening. Unlike the countless other images uploaded to the social network on that day, this one triggered thousands of re-posts and likes — along with hundreds of news stories. Why? Because in the photograph, Sgt. Brandon Morgan is embracing and kissing his male partner, Dalan Wells. The image was posted to a Facebook page called "Gay Marines" with a caption explaining that it shows the homecoming "for a Marine who posts on this page." The text finishes with a simple "Semper Fi, brother."...