Flaws in the use of ID swipe cards.
I had one for 12 years - the photo was updated only twice over that period so I didn't resemble the photo at times.
I grew a beard but didn't have to have a new photo.
I had to start wearing spectacles but didn't need a new photo.
You can see where this is going... if someone obtains another persons ID swipe card it wouldn't take much to appear like the small photo on the card.
Either that or hold the poor victim's family hostage to make them take something airside.
Finally, talking in general about security, ask what B I B means?
Sir George Cayley