Photos: Atlas 5 rocket aims for International Space Station

Crew members on the International Space Station over the weekend continued trying to pinpoint the location of a small air leak in the research outpost’s Russian Zvezda service module, one of the oldest sections of the orbiting laboratory.

A German-built satellite designed to relay data between other orbiting spacecraft and ground stations using laser beams is set for launch in tandem with an Intelsat communications craft Tuesday from Kourou, French Guiana, aboard an Ariane 5 rocket.

SpaceX’s Falcon 9 rocket and Crew Dragon spacecraft were lowered horizontal on pad 39A at NASA’s Kennedy Space Center the day before launch, allowing teams to address an issue with a chilled water loop near the top of the strongback structure.