A partial shutdown affecting the Transportation Security Administration is causing long airport lines and flight delays across the U.S.

Transportation Security Administration employees haven't been paid since the partial government shutdown began on Feb. 14, and staffing shortages are starting to add up. The TSA crunch and spring break travel are now throttling some airport security lines across the US.

Travelers have several ways to check TSA security wait times before heading to the airport.

Agents will miss their first full paycheck this week, and union officials say they expect resignations to start increasing if there's no resolution.