This photo is taken above the Airlock that will be the gateway to space for the International Space Station (ISS). Built by Boeing, the Airlock serves two key purposes’.to keep air from escaping when the hatch to space is opened and to regulate the air pressure before an astronaut enters or leaves the ISS. Clearly visible on the right is the hatch of the Crew Lock which astronauts will leave and enter the space station. On the left is the Equipment Lock where the space suits will be stored.