John Brennan : ` ` System did n't work as it should have '' due to ` ` lapses '' and ` ` human error '' Suspect 's ' demand for airfare ` ` was n't a necessary [ warning ] bell , '' says Brennan . Thomas Kean of the panel says Brennan ` ` wrong when he says this was n't like 9/11 '' . `` He said , 'He 's consorting with extremists in Yemen . ' '' iReport : Tell us about your airport security experiences .
John Brennan : ` ` System did n't work as it should have '' due to ` ` lapses '' and ` ` human error '' Suspect 's ' demand for airfare ` ` was n't a necessary [ warning ] bell , '' says Brennan . Thomas Kean of the panel says Brennan ` ` wrong when he says this was n't like 9/11 '' . iReport : Tell us about your airport security experiences .