An elderly Vietnam War veteran beat down a home invader who had attacked his wife, ultimately leading to the intruder’s death, WACH-TV reports. Around 2 p.m. Monday, 82-year-old Herbert Parrish and 79-year-old Lois Parrish heard a knock on their back door at their home in Columbia, South Carolina. There they found 61-year-old Harold Runnels, who asked whether …