Israel's campaign of air strikes on Gaza's continued for a second night. <br /> <br />The number of casualties is rising and Hamas' retaliation is causing panic inside Israel.<br /><br />For the first time, rockets fired from Gaza have reached the outskirts of Tel Aviv. Air raid sirens sounded there for the first time in more than 20 years.<br /><br />Inside Gaza, the bombardment is causing so many injuries that hospital staff face being overwhelmed. And the return fire into Israel is also causing casualties.<br /> <br />Al Jazeera's Nadim Baba reports from Gaza.
