Rorie Katz, head of Graphic Design for the United Nations Postal Administration, shows the First Day Covers of United Nations 2012 Autism Awareness Postage Stamps during a press conference at the UN headquarters in New York, the United States March 30, 2012. In an effort to bring global awareness about autism, the UN Postal Administration (UNPA) on Friday unveiled a series of stamps with artwork made by those diagnosed with the developmental disorder. [Photo/Xinhua]