Apparently, Simmons posts a message each month for his readers, and this time has chosen to post a cautionary tale about what he sees happening in our near future. (Unless, of course, he was really visited by a time traveler. Nah...) Without giving too much away, I'll just tell you that the traveler goes back in time to New Year's Eve 2006 to warn Simmons about the upcoming Century War and the consequences of living under radical Islam.
Despite the fact that the piece is a polemic, it does work well as a piece of science fiction. I must admit that I wonder why he presumably chose to essentially give the piece away for free, when I imagine he could have found a paying market for it somewhere.