Live coverage: Atlas 5 countdown and launch journal

The backbone of the U.S. military’s global communications network, relied upon by soldiers, ships, jets, aerial drones and allied nations around the world, will receive a new satellite with unprecedented capacity following its launch Wednesday atop a Delta 4 rocket.

SpaceX’s Dragon supply ship returned to to Earth on Sunday with more than 3,800 pounds of NASA cargo, research specimens and other hardware. The commercial capsule was released from the International Space Station’s robotic arm at 4:40 a.m. EDT (0840 GMT), and splashdown in the Pacific Ocean west of Baja California occurred at approximately 10:15 a.m. EDT (1415 GMT).

The scientist in charge of NASA’s OSIRIS-REx mission hopes to apply more than $30 million in leftover funding toward reducing the risk of the probe’s touch-and-go maneuver to snag a piece of asteroid Bennu, then eventually hire more experts to analyze the primordial specimens when they return to Earth in 2023.