vacation this holiday season? so are a number of american airlines pilots who mistakenly got time off due to a computer glitch and that snafu is leaving 15,000 flights that could be cancelled. >> "eyewitness news" reporter frank does live at philadelphia international airport with more on what the airline is trying to do to fix the issue good morning, trang do. >> reporter: good morning, rahel and jim. this is an american airlines hub, terminal c, take a look here, one of the several terminals that american airlines uses out of this airport. you can definitely see how this pilot shortage could be a total disaster for holiday travel. world's biggest airline has a big problem, scheduling glitch allowed too many american airlines pilots to schedule time off at the end of the year which could ground thousands of flights for people heading home for the holidays. >> real bad, holiday coming, we have new years coming, so, a lot of people will be highly upset. >> reporter: allied...