but their music did not, thanks in part to the extraordinary work of francesco lotoro. mposer and pianist, lotoro has spent 30 years recovering, performing, and in some cases, finishing pieces of work composed in captivity. nearly 75 years after the camps were liberated, francesco lotoro is on a remarkable rescue mission, reviving music like this piece created by a young jewish woman in a nazi concentration camp in 1944. ♪ ♪ ♪ ♪ ♪ ♪ ♪ ♪ ♪ ♪ ♪ ♪ >> francesco lotoro ( translated ): the miracle is that all of this could have been destroyed, could have been lost. and instead the miracle is that this music reaches us. music is a phenomenon which wins. that's the secret of the concentration camps. no one can take it away. no one can imprison it. >> wertheim: it seems unlikely-- even impossible- that music could have been performed and composed at a place like this site of unspeakable evil, the most horrific mass murder in human history. this is auschwitz birkenau, the nazi concentration camp in southern poland. set up by the germans in 1940 as part of hitler's "final solution,