Federal health officials will begin tracking passengers who were on the plane Ebola-infected nurse Amber Vinson took from Dallas to Ohio on Oct. 10 — a date when she supposedly did not have symptoms and was not contagious. "We can't rule out that she might have had the start of her illness on Friday," Dr. Chris Braden of the Centers for Disease Control and Prevention said at a Thursday afternoon briefing, citing new information developed by investigators tracing all of Vinson's contacts. "This new information is saying we need to go back now to the flight she took on Friday...