Live coverage: Atlas 5 countdown and launch journal

For the second time this week, United Launch Alliance has delivered an Air Force payload to one of its Cape Canaveral pads for liftoff in July.

Mission controllers plan to unlock the blades on NASA’s Ingenuity helicopter and spin them up to more than 2,000 rpm for a test later this week, a bit of “calisthenics”  before the rotorcraft’s first flight in the atmosphere of Mars as soon as this weekend, the helicopter’s operations lead said Monday.

The launch of a NASA spacecraft designed to smash into an asteroid to try out a technique that could protect Earth from threatening space rocks has slipped from July until November, at the earliest, after development delays partially caused by coronavirus-related work slowdowns.