Unpaid TSA staff are calling out in big numbers. Here are the 5 airports where the problem is worst.

Passengers wait in line at Houston Hobby Airport on March 8,

Brett Coomer/Houston Chronicle via Getty Images

• The partial government shutdown is causing long lines at airports.
• Large numbers of TSA agents are calling out of work, and 366 have left their jobs.
• More than 20% of agents have called out at Atlanta, the world's busiest airport by passengers.

Staffing shortages are causing hourslong lines at airports around the country, but it's much worse at some than others.