Relatives of the Chinese passengers onboard the Malaysia Airlines flight MH370 wear T-shirts with the words "Pray for MH370, safe return" in Beijing Thursday, April 3, 2014. No trace of the Boeing 777 has been found nearly a month after it vanished in the early hours of March 8 on a flight from Kuala Lumpur to Beijing with 239 people on board. (AP Photo/Ng Han Guan)