Earlier quoted context omitted.
Still not "in the wild"; they were arrested in the planning stages, and there is no evidence that at any point they successfully produced TATP let alone getting any of their components through security or whether it would have worked on a plane. That was one group, thirteen years ago, and since then everyone is limited to 100ml? Forever?
Anyway, you’re allowed 10 times 100mL, in separate containers. You can easily blow up an airplane with a liter of the right liquid…
Yeah... The thing is that you can't. Not easily.
You can't do much with a liter of some liquid that won't happen by chance on the way to the airport. And you can't change the liquid a lot while on the plane. You can barely fit seated there.