AUSTRALIA-MALAYSIA-AVIATION-ACCIDENT-UKRAINE-RUSSIA-AIDS

Owen Ryan (front L), executive director of the International AIDS Society, and Chris Beyrer (C), president-elect of the International AIDS Society, prepare to address the media outside the venue for the 20th International AIDS Conference in Melbourne on July 18, 2014, which takes place from July 20-25. The world AIDS community on July 18 mourned several passengers on a crashed Malaysia Airlines plane who were heading to Australia for a global conference on the epidemic. Flight MH17 from Amsterdam to Kuala Lumpur, which US officials believe was hit by a surface-to-air missile, killing all 298 people on board, was due to connect with another flight to Melbourne. Man at back R is unidentified. AFP PHOTO (Photo credit should read STR/AFP via Getty Images)