This is the third time the world has seen this tragedy performed. Act I was in 2006, during Israel's Lebanon War with Hezbollah. Act II played out in 2008 and early 2009, with the first Gaza War. And now Act III is being performed, once again in Gaza. In all three instances, the pattern has been the same: A militant group provokes Israel through kidnapping, bombardment or terrorist attacks. When Israel's collective tolerance reaches its limit, the IDF returns fire with its larger arsenal. In 2006 and 2008, Israel followed up with a ground invasion. We don't know yet whether that will happen again this time around.