SIOUX FALLS (AP) - U.S. Sen. Tim Johnson may be in for a long recovery from brain surgery, according to a Sioux Falls neurologist. Dr. William Rossing said he bases his belief on the length of time that Johnson has been sedated. Doctors used prolonged sedation to minimize swelling after Johnson's emergency surgery for bleeding in the brain. Recovery for someone who has been sedated as long as Johnson, 60, is likely to be "significant and lengthy," Rossing said. It usually takes only a few days to wean a patient from sedation, Rossing said. Johnson has been sedated since Dec....