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SpaceX founder Elon Musk calls upcoming rocket launch the company's most difficult to date

SpaceX founder Elon Musk calls upcoming rocket launch the company's most difficult to date
SpaceX is expected to launch a Falcon Heavy rocket carrying 24 satellites for the Defense Department and the ashes of 100 people, including those of actor James Doohan, who played "Scotty" on "Star Trek." Founder Elon Musk called the launch the company's most difficult to date. Vladimir Duthiers and Anne-Marie Green have more.