Correct Answer: D
Explanation:
SpaceX has launched a top-secret spy satellite for the US government.
The unmanned Falcon 9 rocket lifted off May 1, 2017 from its NASA-leased pad at Kennedy Space Center in Florida.
It hoisted a classified satellite for the National Reconnaissance Office.
Several minutes into the flight, the first stage booster timed for a touchdown at Cape Canaveral Air Force Station. SpaceX strives to return most of its first-stage boosters for reuse.
This was the fourth SpaceX booster landing at Cape Canaveral; even more have landed on an ocean platform.
The company's first recycled rocket flew last month.
SpaceX: Know More
CEO: Elon Musk (2002–)
Founder: Elon Musk
Founded: 2002
Headquarters: Hawthorne, California, United States
Number of employees: ~6,000; (April 2017)
Type of business: Privately held company