Defense Minister Moshe Ya'alon said Monday in a press conference that, "If the leaders of Hamas believe that they will be able to keep up a constant barrage of missiles, rockets and terrorist attacks - they are making a big mistake. If terrorist organizations in the Gaza Strip think that they'll be able to break the State of Israel and our citizens - in the next few days they'll understand how wrong they are. They're firing at us and we will hit them hard."