describe as two corridors where the plane may have flown after it lost contact. one arches toward central asia, possibly as far north as kazakhst kazakhstan. the other toward the southern indian ocean and australia. this comes as malaysian police continued searching the pilots' homes over the weekend and they discuss what portion of the investigation they are focused on this morning. >> they checked the homes of the pilot and co-pilot again on saturday, the 15th of march. the pilot's flight simulator was taken from his house with assistance of his family. the simulator was reassembled that police headquarters. over the past two days, we have been recalibrating the search for mh-370. ittin remains a significant, diplomatic and logistical challenge. >> tom costello joins me now. i see the map behind you. we know the search area. but the reality is, i think, for a lot of people, tom, that it's