remote command from inside the station. During the five hour EVA, the cosmonauts also installed a new handrail on the Kvant-2 to facilitate movements in future space walks. June 1996 - EVAs and Science More Experiments Installed During Fifth EVA The Particle Impact Experiment and the Mir Sample Return Experiment, U.S. space science experiments brought to orbit inside Priroda, were installed on the exterior of the Kvant 2 module during a June 6 EVA lasing about 3 and a half hours. The cosmonauts also replaced a cassette in the Komza experiment on the surface of Spektr. Rapana Girder Assembled on Kvant in the Sixth EVA On June 13, the cosmonauts spent over five hours outside Mir, installing and deploying a Rapana girder on the surface of the Kvant module as a platform for installing future experiments on the station exterior. The 5 meter structure was deployed in four sections. Another activity during this EVA was manual deployment of the Travers radar antenna on the exterior of Priroda. The large antenna had failed to deploy fully by command from inside the station. Science Work Continued In addition to assisting the cosmonauts during EVAs from inside the station, Lucid continued activating equipment, such as the Biotechnology System Facility for long-term biotechnology studies and conducting experiments such as the Humoral Immunity experiment to study spaceflight effects on the human immune system. The crew also monitored various aspects of the spacecraft environment. They took air samples in Spektr and the core module using the Solid Sorbent Air Sampler (SSAS) and the Grab Sample Container (GSC). They recorded effects of spacecraft motion with the SAMS equipment and began evaluation of the Microgravity Isolation Mount (MIM). July 1996 - Greenhouse Work and a New U.S. Record Fourth Shuttle Docking with Mir Delayed On July 12, NASA announced the decision to postpone the July 31 launch of STS-79, the fourth mission Atlantis would dock with Mir, until mid-September. In a post-flight discovery of STS-78, it was found that hot gas had seeped into the joints of the boosters used in STS-78 launch in June. An investigation found that the most probable cause of the leakage was use of a new adhesive and cleaning fluid that was also used on the boosters for STS-79. Although the boosters were judged safe to fly, a decision was made to replace them in order to further study the J-joint failure and