Hey fellow IB people, I'm taking IB HOA HL (history of the americas) and I'm trying to narrow down my HI idea. I want to do something related to the Chernobyl disaster, perhaps connecting it to the fall of the USSR. Was thinking something like "how did the chernobyl nuclear disaster contribute to the fall of the USSR," but that feels just a touch too broad. any ideas on how I could make it a bit more specific?