On June 3, 2013, Port Ass flew to Hong Kong to meet Snowden. Snowden first met Port Ass and "The Guardian" reporters Glenn Greenward and Ivan McAskie at the hotel. Showcasing the contents of the National Security Agency () about theprogram (). The camera carried by Potas really recorded the scene at that time.
The conversation of the four began with warnings about risks related to technology and privacy. After Snowden explained how the huge monitoring system collects and tracked private information with slides supplemented by plain language, and showed the 1 million documents taken from the NSA, They realized that this may be the most far-reaching political scandal of this era, and the documentary "Citizenfour" restored this process from the perspective of participants. Due to practical reasons, Portas and Snowden only got along for a short period of 8 days, so they missed Snowden's departure from Hong Kong to Moscow, and stayed in the transit area of Moscow Sherementyevo Airport for more than a month and stayed there. Material to speak to the world.
