The Transportation Security Administration, responsible for making air travel safer by screening passengers, is now under the microscope for not screening airport employees.

Recent gun and drug smuggling arrests have a number of lawmakers, including Senator Bill Nelson, demanding answers.

If you’ve traveled by air, you’ve dealt with the TSA screeners. You remove shoes, belts and everything else that might set off alarms. But Nelson said alarms are going off in Washington, after a baggage handler at Atlanta’s Hartsfield Jackson International Airport was found to be involved in a gun smuggling ring.

The senator said the employee had access to sensitive areas and never had to undergo any type of search and for six months was sneaking backpacks full of guns onto airplanes bound for New York. Nelson said once the guns arrived, they were sold on the streets.

Senator Nelson and other members of the Senate Commerce Committee will grill TSA brass on what they plan to do to keep situations like that from happening again.

Nelson met with security personnel at Orlando International Airport Friday to look at procedures they have in place to stop security breaches. In 2006 an employee was caught smuggling guns and marijuana to Puerto Rico.

Airport security reassessed the access points and reduced the number of doors employees could enter and exit into sensitive areas. On the remaining doors, screeners were put in place at a cost of millions of dollars per year. But the move worked and Nelson said Orlando International’s security plan is one airports across the nation could learn from.

The senator said of 450 major airports in the country only Orlando and Miami International have made security changes to screen employees and limit their accessibility to sensitive areas.