Preparing for a ground war --- Israeli forces position themselves along Gaza's border making an invasion that much more likely. The cabinet has mobilized up to 75,000 reservists in anticipation.<br/> <br />Explosions rocked Gaza on Saturday. Locals put out a fire after an Israeli air strike destroyed a building. Palestinian officials say one person was killed and several were injured.<br/> <br />More than forty people have been killed since the strikes began several day earlier, the majority of them Palestinians. Three Israeli civilians were killed on Thursday.