The flight represents a major step towards commercial space tourism.
"Our mission is exciting because we deliver exquisite intelligence, surveillance, and reconnaissance capabilities on-orbit for our national and allied warfighters as well as our national decision-makers," said Chad Davis, director of NRO's Office of Space Launch.
The United Launch Alliance will launch SBIRS GEO Flight 5 from Cape Canaveral Space Force Station, Florida, having scrubbed the mission on Monday.
As the confrontation between Israel and Palestinian groups persists, hundreds of rockets collide with the Iron Dome, lighting up the night sky. The air strikes have killed and injured dozens as the U.S. calls for calm.
American space officials and others accused Beijing of acting recklessly for allowing the debris from the rocket to fall back to earth in a seemingly uncontrolled manner over the weekend.
A Chinese Communist Party-aligned newspaper also dismissed fears about the rocket's landing as "fussiness."
NASA Administrator Bill Nelson said: "It is clear that China is failing to meet responsible standards regarding their space debris."
The Long March 5B is expected to re-enter the Earth's atmosphere at some point on Saturday but the point where it will crash down remains unknown.
China said that a "vast majority" of its rocket expected to plummet back to Earth over the weekend will burn on its re-entry and poses a low threat.
The rocket launched on April 29 as part of a Chinese space station mission, and has since been in a slowly decaying orbit.
It is still unknown exactly where or when the Long March 5B rocket will re-enter our planet's atmosphere.
The same model of rocket, a Long March 5B, is expected to re-enter Earth's atmosphere this year. But it is not clear where.
The path of the Long March 5B is being estimated using a tracker website, though it is still unclear where the giant rocket will fall.
The country launched the core module of its first permanent space station on Thursday, marking a new beginning for the China's ambitious new space program that will host astronauts long-term.
The Space Launch System is going to take humans to the moon once more as the most powerful rocket ever built, but there have been concerns about its cost.
Despite the hard landing, the launch of its latest prototype SN8 was a success, giving SpaceX useful data and letting it test some critical flight maneuvers.
Military experts say the new liquid-fueled ICBM appears to more powerful than anything previously known to be in the nation's weapons arsenal.
A journalist made secret recordings of telephone conversations with jailed inventor Peter Madsen which are now set to be broadcast.
Last week, Musk confirmed the SN4 prototype had passed a cryogenic proof test, which marked a big milestone for the project that is designed to send crew and cargo to the moon, and even Mars.
The 64-year-old died after his homemade steam-powered rocket crash landed moments after takeoff near Barstow, California.
He had planned to launch his homemade, steam-powered rocket 5,000 feet into the air.
Two short-range ballistic missiles were launched on Wednesday in North Korea's second such test in less than a week.
A senior 2020 Trump campaign adviser used a 2015 video reportedly showing a Ukrainian rocket launch alongside a description of this weekend's deadly Gaza rockets.
"Whatever the payload, whatever the orbit, getting your satellite into space will soon be as easy as booking an airline flight," said Stratolaunch Chief Executive Officer Jean Floyd.
Moscow is studying the remains of Tomahawk rockets to exploit their weaknesses.