There was a high-profile case a few years ago where Slovakian border police put some RDX-based plastic explosive in the baggage of a passenger flying to Dublin, then forgot to remove it.

Thanks, I'm going to remember this next time I feel like I screwed up at work.

Another fun one. The CIA forgot a bomb in the engine of an actively used school bus after a training exercise.

https://www.npr.org/2016/04/01/472716101/cia-leaves-explosiv...

Did the weapons go through an xray? Did the humans looking at the xray just... ignore what they saw? How do you explain an AK-47 slipping through?

Haha, nice toy, pretty realistic. Next one.

I wonder if one could transport an airsoft weapon that way? I'm not willing to attempt it, of course. It could probably land you in jail in places such as Singapore, Thailand, China, Russia or the US. In Russia they have an article in the penal code specifically for "false terrorism declarations".

Did the weapons get through?

Yes, we obtained >90% success rates with (large) guns.

My sister worked in airport security for a while in the UK and their team also had >90% success rate.

Wow that's not a comforting thought. How is that even possible?

As everyone else has commented, security theater versus effective screening and detection methods.

Into carry on luggage? How do they miss assault rifles but catch my swiss army knife I forgot about? Every. Time.

Because swiss army knives are way more common than AK47s on carry on luggage? Directed Attention Fatigue?

I heard a story from a guy who was a hunter about how he forgot about some misplaced ammo in a backpack that he then used as carry on luggage. Of course security found it and he got himself a criminal record. It happened in Europe, where one doesn't buy ammo at the grocery store and it has to be stored under key separately from the firearm etc.

I smuggle things onto planes all the time. Nothing exciting, just bigger bottles of liquids. The trick? Just hide them in your clothes and walk through the metal detector. Rick Owens pants with a plethora of massive hidden pockets make this all the easier.

Not very high stakes obviously, worst case scenario I might end up losing a bottle of parfume or some hot sauce.