TSA’s inability to properly screen and track employees has been well documented for years. However, the administration has failed to enact multiple reforms aimed at tightening security and making it more efficient, lawmakers said.

TSA still cannot verify their employees’ criminal histories and immigration statuses, according to disclosures made by the Department of Homeland Security inspector general.

“Even 15 years” since the 9/11 terror attacks, “we still see a system that has not complied with the laws we have passed multiple times … and we see failures,” said Rep. John Mica (R., Fla.), chair of the House Transportation Subcommittee.

Following the discovery last year of 73 aviation employees who also were listed on the nation’s terror watch list, TSA has struggled to implement reforms aimed to remedy these security gaps, Mica said.