FILE - In this April 4, 2015, photo, relatives of Chinese passengers on board the missing Malaysia Airlines Flight 370 light candles in a prayer room in Beijing, China. Malaysian Prime Minister Najib Razak announced on Thursday, Aug. 6, 2015, that a wing piece that washed up on Reunion Island last week is from the missing Malaysia Airlines Flight 370. However, French, U.S. and Australian authorities stopped short of full confirmation, frustrating relatives with mixed messages. (AP Photo/Ng Han Guan, File)