I noticed today that my September "Adriatic Treasures" is a go, which surprises and excites me. I'm considering tacking on an extra day in Venice at the end to see Murano/Burano, which I did not see on my previous trip to Venice, but am not sure about the 72-hour negative Covid test that's required for re-entry to the US. I know that Tauck will arrange a Covid test for returning travelers (at our expense), but don't know whether the "72 hour requirement" is set up only for those people who will be returning the day the tour ends. I would love to know the experience of others -- on any tour -- who plan to spend a day or two extra abroad before returning to the US. Please post your experience.