I am tracking 80 for the end of your weekend. Cooler temperatures and the chance of showers back in your sevenday forecast. I will go over all the details coming up the effects of yesterdays fire at a suburban chicago Flight Control center are still being felt across the country. More than 600 flights were canceled at chicagos two international airports. Down for more than 2000 yesterday. There are still reports of long lines at ohare where many stranded travelers spent the evening. Southwest airlines, the dominant carrier at Midway Airport is hoping to resume a full flight scheduled by the end of the day. Authorities say the fire was deliberately set by a contract employee at the control center in aurora. The search for the suspect in the deadly ambush of two Pennsylvania State troopers is entering week three. Authorities say information found on eric freins computer proves he has been planning that attack for years. Investigators say frein opened fire on the State Police Barracks in