Staff gathered for a pep rally as they prepare for the FIFA World Cup, America's 250th birthday, and the MLB All-Star Game.
Operations at Philadelphia International Airport are returning to normal.
The checkpoint had been closed for two weeks due to TSA staffing shortages amid the partial government shutdown.
At Philadelphia International Airport, about 15% of TSA workers called out Monday, according to union officials, a figure that's down from roughly 25% over the weekend.
With another spring break weekend approaching, travelers are expecting delays as the nationwide TSA staffing crisis continues.
ICE agents were at Philadelphia International Airport on Tuesday to assist with security as a partial government shutdown continues to impact the TSA.