We’ll all be showing our respect for the victims of the air disaster with a moment of silence at 4pm. Katy Perry and Unicef have put together a special clip to the song Unconditionally. The video was supposed to be launched at the International Aids Conference in Australia, but many of the passengers on the Malaysian air flight were on there way there when this happened. So Katy Perry decided to dedicate this video to the innocent victims instead. A beautiful gesture.