GAZA CITY, Gaza Strip - In a challenge to Palestinian leader Mahmoud Abbas, dozens of masked Hamas gunmen took over Gaza City's central square on Saturday and announced they would not stop attacks on Israel, despite Israel's ongoing withdrawal from the Gaza Strip. The show of force by Hamas came just as Abbas announced Jan. 25 as the date for legislative election, a move that could boost his international credibility and encourage Hamas to hold its fire during the pullout. Abbas, who is under intense international pressure to disarm militant groups, has been urging them not to flaunt their weapons...