Atikah Abdul Rahman, 20, and Hannan Jamila (R), 16, nieces of Captain Wan Amran, who was on board Malaysia Airlines flight MH17, arrive at Kuala Lumpur International Airport in Sepang July 18, 2014. World leaders demanded an international investigation into the shooting down of the Malaysian airliner over eastern Ukraine in which all 298 people on board were killed, a tragedy that could further heighten tensions between Russia and the West. REUTERS/Olivia Harris (MALAYSIA - Tags: DISASTER TRANSPORT)