Vapors stream away from a United Launch Alliance Atlas 5 rocket during a fueling test Monday on pad 41 at Cape Canaveral Air Force Station. Credit: United Launch Alliance
The Atlas 5 rocket that will send NASA’s Perseverance rover toward Mars next month aced a countdown rehearsal Monday at Cape Canaveral, helping ensure the United Launch Alliance-built rocket is ready for liftoff during the rover’s 23-day launch window…More about this article in link below…