But many across the country have called in sick or otherwise weren't able to work, including up to 170 agents who are working without pay at John F. Kennedy International Airport in New York, CNN reported Friday.
The publication said whereas 25 to 30 TSA staff are absent from a typical shift, the numbers at Dallas Fort Worth International Airport had shot up by 200-300 percent.
And it appears that an increasing number of them aren't having it anymore.
The TSA then issued a statement cautioning that while wait times "may be affected", they now "remain well within TSA standards" and "security effectiveness will not be compromised" - not necessarily a reassuring statement, given the TSA's "standards" for both wait times and security.
Hundreds of Transportation Security Administration workers called off work sick this week after being forced to work without pay during the now 14-day partial government shutdown, union and agency officials said.More news: China says talks on U.S. tariff fight scheduled for Monday
It is unclear how many agents are missing their shift at BWI because they say they're too sick to work - or how that number compares to a normal period. "Obviously, it's something we will keep a close eye on", Mehigan said in a phone interview Saturday morning.
'This staffing crisis is negatively affecting the National Airspace System, and the shutdown nearly certainly will make a bad situation worse, ' National Air Traffic Controllers Association President Paul Rinaldi said in a statement.
The president is meeting with a group this weekend he assembled to tackle the issue and hopefully find a solution.
Numerous employees are forced to call out because they can no longer afford childcare without a paycheck, or need to use the time they would be working for the TSA to earn money they can use to pay rent or other living expenses. Security effectiveness will not be compromised and performance standards will not change.
The statement said TSA is "closely monitoring the situation" and "grateful to the agents who show up to work, remain focused on the mission and respectful to the traveling public as they continue the important work necessary to secure the nation's transportation systems".
"I don't care that most of the workers not getting paid are democrats, I want to stop the shutdown as soon as we are in agreement on strong border security!" A shutdown could last months or even years, Senate Minority Leader Chuck Schumer quoted Trump as saying.
Thomas' union represents some 55,000 TSA employees, who screen approximately 800 million fliers a year; he is based at JFK.