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A SpaceX Falcon Heavy rocket thundered into the sky over Florida’s Space Coast Sunday night and deployed a sophisticated internet satellite for Viasat into a circular orbit more than 20,000 miles over the equator, delivering for a competitor to SpaceX’s own Starlink broadband network.

SpaceX says engineers completed checks of the Falcon Heavy rocket, its satellite payloads, and ground systems at the Kennedy Space Center after a lightning strike on the launch pad’s tower Thursday night, part of a wave of severe weather that forced officials to delay the launch attempt.