In the 19th century, thousands of Greek men died while diving for sponges off the island of Kalymnos. Why did these men risk their lives, even after they knew full-well the risks involved? Why did later generations continue this deadly practice when they emmigrated to Tarpon Springs, Florida, generations later? Dimitrios Gatsiounis sat down with Michael Kalafatas, author of The Bellstone: The Greek Sponge Divers of the Agean, to explore these and other questions.