A 155mm mobile cannon is seen after it was transported to an area just outside the northern Gaza Strip

A 155mm mobile cannon (front) is seen after it was transported to an area just outside the northern Gaza Strip November 15, 2012. Two rockets fired from the Gaza Strip targeted Tel Aviv on Thursday in the first attack on Israel’s commercial capital in 20 years, raising the stakes in a showdown between Israel and the Palestinians that is moving towards all-out war. REUTERS/Amir Cohen (ISRAEL – Tags: POLITICS CIVIL UNREST)