Video: Take a virtual ride on the Atlas 5 launch pad emergency ziplines

A major test of the system that would shoot SpaceX astronaut crews away from a failing rocket is scheduled for no earlier than May 5 from a specially-built mount at Cape Canaveral’s Complex 40 launch pad, NASA announced Tuesday.

In the home stretch of nearly a half-year on the International Space Station, four astronauts suited up and rode their SpaceX-owned Crew Dragon “Resilience” spaceship to a new docking port outside the orbiting research lab Monday, a first-of-its kind maneuver for the new generation of commercial crew spaceships.

The shift in launch date is to allow more time to build in redundancy to account for the helium leak. The launch is currently scheduled for no earlier than Saturday, May 25, at 3:09 p.m. EDT (1909 UTC).