Possible Clues:

• X-ray examiners: Abbr.
• Org. with a '3-1-1' rule
• Pre-check checkpoint agcy
• Screeners at JFK
• Airport worker's org.
• Terminal screening grp
• Scanners at JFK
• Org. that operates a PreCheck program
• Grp. that confiscates water bottles
• Hijack-prevention org