People walk among debris, aftermath of Israeli strikes at the area, where Israeli hostages were rescued on Saturday, in Nuseirat refugee camp in central Gaza, on Sunday, June .. Abed Khaled/ReutersTwo days after an Israeli military operation rescued four hostages being held by Hamas in Nuseirat refugee camp, central Gaza, killing more than 270 Palestinians, according to Gaza health officials, new details are emerging about what was one of the most dramatic and deadly events since the war started.The daytime rescue operation, which took weeks of planning, caught militants holding…