Why do Flights get cancelled if there is Ash in the clouds?

Because they represent a huge risk to the aircrafts, to start off they difficult visibility a lot reducing it to zero in some places, cause engines failure and controls disruption.

The ashes melt to a lower temporature than the engine's temperature, thus it can melt, slip around and reach the turbines affecting the high pressure flows which can cause the engines to stall.

There are a variety of reasons, but that is the main one which reduces heavily any sort of chances you could have when getting into an ash cloud.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.