Prague–Ruzyn? Airport began operations on 5 April 1937, but Czechoslovak civil aviation history started at the military airport in Prague–Kbely in 1919. The Prague Aviation Museum is now found at Kbely Airport. Due to the insufficient capacity of Kbely Airport by the mid-1930s, the government decided to develop a new state civil airport in Ruzyn?. Among the major awards Prague Ruzyn? Airport has received is the Diploma and Gold Medal, granted in 1937 at the occasion of the International Art and Technical Exhibition in Paris (Exposition Internationale des Arts et Techniques dans la Vie Moderne, also known as Paris 1937 World's Fair) for the technical conception of the central airport, primarily the architecture of the check-in building (nowadays known as Terminal 4) designed by architect Adolf Benš. In one of the most dramatic moments in its history, the airport was seized by Soviet paratroopers on the night of 20–21 August 1968, who then facilitated the landing of Soviet troops and transports for the invasion of Czechoslovakia. An online petition organised by a Slovak film director, Fero Feni?, calling on the government and the Parliament to rename Prague Ruzyn? Airport to Václav Havel International Airport attracted – in just one week after 20 December 2011—the support of over 65,000 signatories both within and outside the Czech Republic. A rendition of the airport with the proposed Václav Havel name in the form of his signature followed by his typical heart symbol suffix was included in the blog's article in support of renaming of the airport. This name change took place on 5 October 2012 on what would have been Havel's 76th birthday. The PRG name of the airport for IATA and ICAO will remain the same. The main runway 06/24 was reconstructed from 2012 to 2013 due to poor technical conditions. During reconstruction, runway 12/30 was the only usable runway as runway 04/22 is closed permanently. The runway reconstruction was originally planned for three stages. The first stage in 2012, the second stage in 2013 and the last stage in 2014. Runway 12/30 (which would be used during the reconstruction of the main runway) is not equipped for low visibility landings as it offers only ILS CAT I landings. In addition, the approach path of runway 12/30 goes above high-density population areas (such as Prague 6 and Kladno). Therefore, the second and the third stage of the runway reconstruction had to be merged so the works could be finished in 2013.