Elon Musk's SpaceX launched a pair of Falcon 9 rockets loaded with a combined four dozen Starlink communication satellites into space Tuesday morning from both U.S. coasts.

SpaceX launched 21 of its Starlink internet satellites early Jan. 21, five days after a test flight of the company's Starship megarocket ended in an explosion.

The United States Federal Aviation Administration (FAA) has suspended SpaceX rocket flights following the explosion of the upper stage of the Starship/Super Heavy. An investigation is necessary due to the space debris that fell to Earth after the explosion.

Debris from the rocket's upper stage may have caused property damage, prompting an investigation into Starship's "rapid unscheduled disassembly."