PERTH, AUSTRALIA - APRIL 03: Australian Prime Minister Tony Abbott (R) farewells Malaysian Prime Minister Najib Razak after his visit to Perth during the search of missing Malaysia Airlines flight MH370 at Perth International airport on April 3, 2014 in Perth, Australia. The search continues off the Western Australian coast for Malaysia Airlines flight MH370 that vanished on March 8 with 239 passengers and crew on board. The flight is suspected to have crashed into the southern Indian Ocean with no survivors. (Photo by Paul Kane/Getty Images)