WASHINGTON (AP) — Mark Schiefelbein has been based in Washington, D.C., with AP for about three years, and before that spent a decade in Beijing at AP’s China bureau. Here’s what he had to say about this extraordinary photo. Why this photo? This was an event that had never happened before in the 250-year history of the United States and may never happen again: a night of mixed martial-arts cage match brawls on the South Lawn of the White House, with bloodied competitors battling it out in front