Over the past few weeks, a slowly growing series of rocket attacks by Hamas on Israel, and retaliatory strikes by Israeli forces, has sharply escalated into a crisis. The skies over the Gaza Strip and southern Israel have filled with hundreds of rockets, missiles, and warplanes since Wednesday, bringing varying levels of destruction to the populations below. Tensions are growing as Israel's military has called up thousands of reservists and deployed troops along the border. At the same time, Egypt's new Prime Minister Hisham Kandil made an official visit to Gaza today. Meanwhile rocket attacks continued, setting off air raid sirens as far north as Tel Aviv.