Spring break travel across much of the country has increased congestion at airports already experiencing long security lines as a result of the partial government shutdown. Adding to the problem, thousands of flights were canceled or delayed Monday as powerful storms swept across the eastern half of the U.

Passengers continue to face long waits in airport security during the ongoing shutdown of the Department of Homeland Security, as TSA agents have now missed a full paycheck.

More than 300 TSA employees have quit, DHS said on Friday, and the BBC's US partner, CBS News, found call-out rates have more than doubled since the funding lapse began.