Boeing engineers in New Mexico are readying a Starliner spacecraft for a critical pad abort test this fall to demonstrate the capsule’s ability to escape an emergency on the launch pad before green-lighting the capsule to carry astronauts.

A powerhouse communications satellite with up to five times the capacity of most existing telecom craft reached orbit Wednesday after a nighttime blastoff from French Guiana aboard an Ariane 5 rocket, marking an auspicious start to the deployment of Intelsat’s $2 billion next-generation satellite network.

SpaceX launched an unpiloted Crew Dragon spacecraft aboard a Falcon 9 rocket from pad 39A at the Kennedy Space Center at 10:30 a.m. EST (1530 GMT) Sunday. SpaceX triggered an escape maneuver using the Dragon’s thrusters about a minute-and-a-half after liftoff to verify the launch abort engines can safely carry the capsule — and astronauts on future missions — away from a failing rocket.