South Korean students pay a silent tribute in front of candles and pictures of Ye Mengyuan and Wang Linjia, both victims of the Asiana Airlines flight 214 crash, in central Seoul July 11, 2013. Asiana Airlines Flight 214 crashed in San Francisco on Saturday, killing the two teenage girls and injuring more than 180 people. The two victims, Ye and Wang, were friends from Jiangshan Middle School in Quzhou. [Photo/Agencies]