Israel said Saturday that it killed Hezbollah leader Hassan Nasrallah, dealing its most significant blow to the Lebanese militant group after months of fighting. There was no immediate confirmation from Hezbollah. Nasrallah becomes the latest, and by far the most powerful, target to be killed by Israel in weeks of intensified fighting with Hezbollah. The army said that several top Hezbollah commanders were killed along with Nasrallah in a powerful airstrike Friday. The military said it carried o