Rockets are lighting up the sky on the border of Israel and the Gaza Strip.<br /> <br />Weeks of escalating unrest have turned even more deadly.<br /> <br />Now residents of Gaza are digging out from the destruction, with a death toll of at least 20 people.<br /> <br />An aerial bombardment by Israel Tuesday may be just the start of a new offensive against Islamist militants.<br /> <br />Israeli Prime Minister Benjamin Netanyahu:<br /> <br />(SOUNDBITE) (Hebrew) ISRAELI PRIME MINISTER, BENJAMIN NETANYAHU, SAYING:<br /> <br />"Israel is in the middle of an operation to return security to our region. We will not tolerate the firing of missiles on our cities. I have ordered a significant broadening of the army's operation against Hamas and the terrorists of other groups in the Gaza Strip."<br /> <br />Hamas had vowed to strike further inside Israel after Israeli airstrikes killed six people in a home belonging to a member of the group.<br /> <br />Another group from Gaza, the so-called Palestinian Factions group, has blamed Israel for
