What exactly caused that shocking crash near the end of NASCAR's Texas Truck race?

While the battle for the lead captivated viewers, few eyeballs (and almost no cameras) were fixated on the very back of the field near the end of Friday's NASCAR Craftsman Truck Series race.
But suddenly, three trucks nowhere near the front of the pack suffered significant damage in a major crash on the frontstretch. The race was red-flagged, and TV cameras only caught part of the story, but ...Keep reading