The mast broke near the spreaders. Early examination think that the spreader moved downward, then twisted, and then the mast tore in two front to back.
More later. . . .
Well, the examination was damn near spot on. The starboard spreader moved up, not down. I was at Robbie and Jill's taking the images off the card to the computer, and damn near fell off the sofa when I saw it. Holy **** guys, take a look at this picture. Greg, Robbie and all jump up and there it was. I just happen to have taken a picture of them as they were heading out to the start line showing the spreader at a sharp upward angle.