By Daniel Kline One of the big three cruise lines just extended its covid-related protocols in the United States until the end of September. The cruise industry got hit by a perfect storm when the covid pandemic hit. For an industry vulnerable to storms in general, it was a terrible combination of events that left the industry shuttered, while hotels, theme parks, arenas, and other venues all remained closed for much less time. That’s because the United States government only has limited control over how private industry operates. A local municipality may shutdown industries like the way New Y…