WRAPUP 1-Israel, Gaza fighting rages on as Egypt seeks truce

* Two children killed, 15 people injured in pre dawn raids * Hamas spokesman defiant in televised statement * Egypt moves to broker ceasefire; Israel threatens invasion GAZA/JERUSALEM, Nov 18 (Reuters) - Israeli warplanes struckGaza militants for a fifth straight day on Sunday and itsmilitary prepared for a possible ground invasion, though Egyptsaw "some indications" of a truce ahead. Forty ...