Head of TSA Out Over Homeland Security Investigation

Detection machines and agents failed to spot weapons and explosives 67 out of 70 times during an investigation at several airports.
1:45 | 06/03/15

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Transcript for Head of TSA Out Over Homeland Security Investigation
Tonight, a major development in a story ABC news broke 24 hours ago. The sting, the major security breach at dozens of American airports. A stunning number of fake explosives, weapons slipping right past those tsa agents. Americans spending hours in those lines, taking off our shoes, pulling out computers and now comes word of what was missed. Tonight, the fallout, the head of the tsa fired from his post. ABC's David Kerley asking the tough quells tonight. Reporter: The failures here. Right at the security checkpoints, led to the ouster of the head of tsa. He's being reassigned. As ABC news first reported, so called red teams from the department of homeland security were able to beat these checkpoints with weapons or bomb components 67 out of 70 times. That's a 95% failure rate. This is alarming. Nothing short of alarming. I am jeh Johnson. Reporter: The homeland security secretary, so displeased, he is demanding changes now, including retraining of tsa officers and supervisors. Testing all of those detection machines, which apparently failed, too, partly because they're poorly maintained. Is tsa broken? I don't think tsa is broken. Obviously, the findings here are troubling. And clearly we want to be able to continue to test and probe our system. A lot of passengers fed up when they hear about this, David. What are flyers going to face now as they go through security? Reporter: It's unclear if we'll see any dramatic changes, if you and I will notice in the line best hind me. The wait times of over 20 minutes dropped from last year to this year, but at airport security expert told me tonight, there is a chance the wait times could increase as tsa reassesses the way it does business. All right, David Kerley, live in Washington. David, thanks.

This transcript has been automatically generated and may not be 100% accurate.

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