A foreign government (Country X) inflicts irreparable damage on several of America's Crown Jewels: it's National Parks and major Tourist Destinations.
Why would they do this? To achieve some satisfaction from returning the grief imposed on them by America's sanctions.
But which is Country X? There are several major ones to choose from: N. Korea, Russia, Iran, Yemen, Syria, and Afghanistan; plus some minor ones: Cuba, Belarus, Myanmar, Ethiopia, Venezuela, and many others. It would have to be one with many highly skilled individuals and lots of money.
Read the story and pick one.