Today is expected to be one of the busiest travel days of the Thanksgiving holiday week and a lot of those travelers are catching flights. For the second day in a row, there were long lines at security at the Pittsburgh International Airport. The good news is that as of 6 a.m., all of the departures were on time. More than 30,000 travelers are expected to pass through Pittsburgh International Airport today. This morning, the alternate security checkpoint was being used to help get travelers on their way quicker. With that in mind, officials are asking travelers to arrive at least two hours prior to their flight to make sure there is plenty of time to get through security. A second rush is expected this afternoon once people get out of work.