Israel carried out deadly bombardments in Gaza for a second day on Saturday, hitting hundreds of targets, after a week-long truce with Hamas militants collapsed despite international calls for an extension. Smoke again clouded the sky over northern Gaza, whose Hamas government said 240 people had been killed since the pause in hostilities expired early Friday. According to the United Nations, an estimated 1.7 million people in Gaza — around 80 percent of the population — have been displaced by eight weeks of war which have left them short of food…