For months before the bombs started falling, Hayden Bassett watched over the cultural riches of Ukraine – the cathedrals of Kyiv, the historic buildings of Lviv, museums across the country and the ancient burial sites that dot its steppes. Using satellite imagery, Bassett, 32, [a University of Virginia alumnus] an archaeologist and director of the Cultural Heritage Monitoring Lab at the Virginia Museum of Natural History, has monitored and mapped much of the country’s national heritage as part of a civilian effort to mark the sites that could be devastated by war.