Much of the heat in a South Carolina congressional race comes from four years ago - a battle over what started as a controlled burn on the farm of Republican U.S. Rep. Henry Brown that spread to a national forest. Brown wants opponent Linda Ketner to pull an ad critical of the 1st District congressman, who fought a fine levied by the U.S. Forest Service for charring 20 acres in the Francis Marion National Forest in 2004. The Brown campaign, in a letter to Ketner, called the ad "misleading and dishonest." The Democrat, making her first run for office, plans to continue airing the message. ...