With her hair turning silver grey, her strong face and tall frame, there is no doubting the lineage of the woman introduced as Senator John Kerry's sister. But unlike her brother, the presidential candidate, Diana Kerry is no politician. At 57, the drama teacher has a forthright way of saying exactly what she thinks. Asked about the relentless attacks on her brother's Vietnam War record by the Republican-backed Swift Boat Veterans for Truth, she comes out swinging. "We did expect that the opposition would use negative and divisive smear tactics, because that has been their strategy in the past," she...