Baltimore-Washington International Thurgood Marshall Airport said it closed a checkpoint Sunday to "efficiently use staffing." The airport tweeted that such closures were common before the shutdown and have "minimal, if any, impact on passengers."
The TSA said it tapped members of its National Deployment Force, usually called in to help with staffing shortages when major events or national disasters descend on a city. The added staff helps bulk up security at a handful of larger airports, including New York's LaGuardia and Hartsfield-Jackson Atlanta International, the agency said.
"Came early to @LGAairport assuming long waits and lines," traveler Shelly Maddox tweeted Monday from LaGuardia. "We have never had a better experience. Absolutely no wait and the @TSA workers had a smile on their face. Professionals."
The Atlanta airport along with Seattle's Sea-Tac International Airport were among those where security wait times reached 60 minutes at some checkpoints last week. A Sea-Tac airport spokesman blamed the high volume of passengers heading out for the holiday weekend.
The shutdown began three days before Christmas when President Donald Trump and the Democratic Congress reached a stalemate over Trump's demand for $5.7 billion for a wall along the Mexican border.
Historically, federal employees who drew no pay during government shutdowns have ultimately been paid whether they worked or not. This shutdown has been the longest in U.S. history.
The TSA workers' plight has drawn support. Gene Simmons and Paul Stanley of the band KISS announced they will provide free food at their Rock & Brews Restaurants nationwide. At Miami International Airport, Chef Creole gives TSA workers free lunch and dinner every day they work without pay.
Sunday, Trump tweeted his thanks to federal employees.
"To all of the great people who are working so hard for your Country and not getting paid I say, THANK YOU - YOU ARE GREAT PATRIOTS!" he tweeted. "We must now work together, after decades of abuse, to finally fix the Humanitarian, Criminal & Drug Crisis at our Border. WE WILL WIN BIG!"