KENNEDY SPACE CENTER, FLA. - Technician Saul Ngy, with United Space Alliance, prepares to install a spar on the wing of the orbiter Atlantis. The Reinforced Carbon Carbon (RCC) panels are mechanically attached to the wing with a series of floating joints - spars - to reduce loading on the panels caused by wing deflections. The aluminum and the metallic attachments are protected from exceeding temperature limits by internal insulation.