Attired in a training version of the Extravehicular Mobility Unit, (EMU), space suit, STS-115 astronaut and mission specialist, Heidemarie M. Stefanyshyn-Piper, is submerged into the waters of the Neutral Buoyancy Laboratory, (NBL), near Johnson Space Center for training in preparation for the STS-115 mission. Launched on September 9, 2006, the STS-115 mission continued assembly of the International Space Station, (ISS), with the installation of the truss segments P3 and P4.