ISRAEL LAUNCHED AIR STRIKES AGAINST PALESTINIAN TARGETS ACROSS THE GAZA STRIP ON SUNDAY AND SAID IT WOULD CONTINUE AN OPEN-ENDED OFFENSIVE AFTER REBUFFING A CEASEFIRE PROPOSED BY PRIME MINISTER ISMAIL HANIYEH OF HAMAS. ISRAELI LEADERS SAID THE MILITARY WOULD PRESS ON WITH AIR AND GROUND ASSAULTS UNTIL PALESTINIAN FIGHTERS RELEASED CORPORAL GILAD SHALIT, A SOLDIER ABDUCTED IN A CROSS-BORDER RAID ON JUNE 25, AND HALTED ROCKET FIRE ON ISRAELI CITIES.