ISRAEL - HAMAS   On this edition of the program Natan Sachs, Fellow at the Center for Middle East Policy at The Brookings Institution, and Said Arikat, Washington Correspondent and Political Analyst for the Jerusalem based Al Quds Daily Newspaper, discuss the roots of the current hostilities between Israel and Hamas, each side’s motivations and demands, and prospects for reaching a ceasefire leading to a long-term political settlement with host Carol Castiel.