You may wonder why the second week of October 2007 was proclaimed “National Tae Kwon Do Week” in Cedar Rapids Iowa.  Here’s one good reason: That week, in the middle of a Cedar Rapids auditorium, eight people crouched shoulder to shoulder to form a human hurdle, like the row of cars that a stuntman jumps with his motorcycle. Another person stood at the far end of this human chain, holding up a small pine board. With only a short running start, his teammate leapt over all eight people and broke the board with his feet before landing.