NEW : TSA chief spells out security measures . Abdulmutallab reportedly failed to set off the bomb , which metal detectors did n't detect , though his attempt led to airport screening procedures that have caused a holiday travel uproar . President Obama says new screening methods are best options available . Obama says that federal agencies face ` ` enormous pressure '' to do this . Some have criticized the new methods , including pat - down and CT scans .
NEW : TSA chief spells out security measures . President Obama says new screening methods are best options available . Obama says that federal agencies face ` ` enormous pressure '' to do this . Some have criticized the new methods , including pat - down and CT scans .