Processing Facility Bay 1 technicians check details for the installation of the forward reaction control system.

In NASA Kennedy Space Center’s Orbiter Processing Facility Bay 1, technicians check details for the installation of the forward reaction control system on Atlantis (behind them). The control system fits just behind the nose cone and provides the thrust for attitude (rotational) maneuvers (pitch, yaw and roll) and for small velocity changes along the orbiter axis (translation maneuvers). Processing of Atlantis is under way for mission STS-115, the 19th flight to the International Space Station.