Why should american citizens learn about the bombings of hiroshima and nagasaki?

Why shouldn't they? It's one of the biggest tragedies of the human history, completely destroying 2 whole cities in few seconds, killing lots of people and making thoseplaces inhabitable for years. So in order to prevent anything like this happen again, you should learn what happened and how terrible it is, especially if it's happened because of your nation.

Is this a question? i'm confused

Some of her  assignments would be creation of drugs. she is a medical chemist after all so she'd need to have the necessary knowledge to make medicine which can later be sold in a pharmacy