A Palestinian Hamas supporter attends a protest against Israel's attacks on the Gaza Strip, in Gaza City, on March 3, 2008. In the three and a half decades since it began as an underground militant group, Hamas has pursued a consistently violent strategy aimed at rolling back Israeli rule. Despite bringing enormous suffering to both sides of the conflict, it has made steady progress. But its stunning incursion into Israel over the weekend marks its deadliest gambit yet, and the already unprecedented response from Israel threatens to bring an end to its 16-year rule over the Gaza Strip. (AP Photo/Khalil Hamra, File)