Live coverage: SpaceX grounds launch to wait for better recovery weather

United Launch Alliance’s Delta 4-Heavy rocket lifted off at 11:10 a.m. PST (2:10 p.m. EST; 1910 GMT) Saturday from Vandenberg Air Force Base, California, after a month-long delay to troubleshoot a hydrogen leak in one of its boosters. The heavy-lifter was on a mission to send a U.S. government spy satellite into orbit.

Japan’s Epsilon rocket delivered a civilian-operated radar imaging satellite to orbit Wednesday on a mission to demonstrate the performance of a new commercial spacecraft design and collect all-weather imagery for use in emergencies, mapping and global surveillance.

Boeing and SpaceX are readying for launch abort tests in the coming weeks to validate the crew escape systems for the new human-rated Starliner and Crew Dragon spaceships, now scheduled to begin ferrying astronauts to the International Space Station in the first half of next year.