STS-104 was a Space Shuttle mission to the International Space Station (ISS) flown by Space Shuttle Atlantis. Its primary objectives were to install the Quest Joint Airlock and help perform maintenance on the International Space Station. It was successful and returned to Earth without incident, after a successful docking, equipment installation and three spacewalks.
The primary purpose of the flight was to deliver and install the Quest airlock. The Joint Airlock is a pressurized flight element consisting of two cylindrical chambers attached end-to-end by a connecting bulkhead and hatch. Once installed and activated, the ISS airlock became the primary path for International Space Station space walk entry and departure for U.S. spacesuits, which are known as Extravehicular Mobility Units, or EMUs. In addition, the Joint Airlock is designed to support the Russian Orlan spacesuit for EVA activity.
This patch depicts the launch of Space Shuttle Atlantis and the successful completion of the mission objectives as signified by the view of the ISS with the airlock installed. The astronaut symbol is displayed behind Atlantis as a tribute to the many crews that have flown before. The hard work, dedication, and teamwork of the airlock team is represented by the ISS components inside the payload bay which include the Joint Airlock and four high pressure gas tanks containing nitrogen and oxygen. In the words of a STS-104 crew spokesperson, "The stars and stripes background is symbolic of the commitment of a nation to this challenging international endeavor and to our children who represent its future." The NASA insignia design for Shuttle flights is reserved for use by the astronauts and for other official use as the NASA Administrator may authorize. Public availability has been approved only in the form of illustrations by the various news media. When and if there is any change in this policy, which is not anticipated, it will be publicly announced.
