[Pope Francis greets a group of Syrian refugees upon lading at Rome's Ciampino airport Saturday, April 16, 2016. Pope Francis gave Europe a provocative and concrete lesson in how to treat refugees Saturday by bringing home 12 Syrian Muslims aboard his charter plane after an emotional visit to the hard-hit Greek island of Lesbos. (Filippo Monteforte/Pool Photo via AP)]Pope Francis says his gesture is "a drop of water in the sea" of Europe's migration crisis. Yet for 12 Syrian refugees, the pope's decision to fly them back to Italy from Greece is an act of ...