This is why airport security may take longer than your flight

Long wait lines to clear security at the nation's airports has become a major issue this year. But it's a problem that has been building for years as the number of screeners employed by TSA has fallen, while the number of flyers waiting to get through the security checkpoints has steadily increased.

Source: Transportation Security Administration; 2016 reflects predicted checkpoint volume; Published May 19, 2016.