Undercover Test: Airport Screeners Miss 90% of Bombs

Checkpoint security screeners at Denver International Airport last month failed to find liquid explosives packed in carry-on luggage and also improvised explosive devices, or IED's, worn by undercover agents sources told 9NEWS.

"It really is concerning considering that we're paying millions of dollars out of our budget to be secure in the airline industry," said passenger Mark Butler who has had two Army Swiss knives confiscated by screeners in the past. "Yet, we're not any safer than we were before 9/11, in my opinion."

The Transportation Security Administration (TSA) screeners failed most of the covert tests because of human error, sources told 9NEWS. Alarms went off on the machines, but sources said screeners violated TSA standard operating procedures and did not hand-search suspicious luggage, wand, or pat down the undercover agents.

"The good news is we have our own people probing and looking and examining the system," said Rep. Ed Perlmutter, a Democrat in the 7th congressional who sits on the House Homeland Security and transportation committees. "The bad news is they're finding weaknesses."

After 9NEWS told Perlmutter about the undercover results, he requested a classified briefing from the TSA about the team. Four TSA and Homeland Security Department officials briefed the congressman last week.

"The bottom line is, we've got to plug those holes," said Perlmutter. "We can't have those kinds of problems because we want to have people who fly across this nation be as safe as possible."

In one test, sources told 9NEWS an agent taped an IED to her leg and told the screener it was a bandage from surgery. Even though alarms sounded on the walk-through metal detector, the agent was able to bluff her way past the screener.