TSA TSO CBT study materials
TSA TSO CBT study resources

The Overlapping Bag at Lane 3

TSA TSO CBT · Put your knowledge to work in context.

All case studies

The Overlapping Bag at Lane 3

You are the primary X-ray operator at Lane 3. A passenger sends through a black carry-on bag. On the monitor you see a dense, dark rectangular mass in the lower third of the bag with a thin bright outline and a small cylindrical bright object lying across its edge. The bag is crowded: a laptop sits above the mass, a water bottle is visible near the top, and several loose cables create thin bright lines throughout. The passenger is watching the belt and has already placed a second bin behind the bag. Your lane has a queue of about 12 passengers and a secondary screening table is staffed and open two meters to your right.

1. Describe how you would interpret the dense rectangular mass and what immediate action you would take, and explain your reasoning.

Read the worked answer

The dense dark mass with a thin bright outline is consistent with a thick metal object or a tightly packed dense item, and the small bright cylinder lying across its edge could be a battery, a tool, or part of the object. Because the bag is cluttered, the mass may be partially occluded and I cannot confirm it is harmless from this single view.

Action:

  1. Do not clear the bag on this view alone. Rotate the bag or request a second view to separate the mass from the laptop and cables.
  2. If the mass remains unresolved, divert the bag to secondary screening at the open table to the right, which is staffed and close.
  3. Keep the queue moving by directing the next passenger to the open lane position while the bag is resolved.

Reasoning: a dense, unresolved mass with an adjacent bright cylinder is a genuine ambiguity, not a routine item. The correct judgment is to resolve the ambiguity before clearing, using the available secondary table rather than guessing.

2. The passenger says, "That's just my tool kit, I travel with it all the time." How does this statement affect your decision, and what do you say?

Read the worked answer

A passenger's explanation is useful context but is not evidence. It does not change the requirement to resolve the image. I would acknowledge the statement politely and continue the screening process.

What I would say: "Thank you, I appreciate you letting me know. I still need to take a closer look to confirm what's inside, and then you'll be on your way."

Reasoning: screening decisions are based on the image and physical inspection, not on passenger claims. Being courteous keeps the interaction calm while the inspection proceeds. If the inspection confirms a harmless tool kit, the bag is cleared normally.