Photos: Atlas 5 on the pad awaiting liftoff on NROL-52

Two key pieces of hardware needed for NASA’s next Mars rover — an Atlas rocket booster and sterile components of the rover’s sample collection system — recently arrived at Cape Canaveral ahead of the mission’s scheduled launch July 17.

The last unflown variant of United Launch Alliance’s Atlas 5 launcher — fitted with a five-meter fairing and a single strap-on solid rocket booster — will carry a pair of U.S. military space surveillance satellites toward geosynchronous orbit from Cape Canaveral late this year, according to a Space Force spokesperson.

Final assembly of the United Launch Alliance Atlas 5 rocket slated to blast off Jan. 18 with a U.S. Air Force surveillance satellite designed to detect missile attacks has begun at the booster’s Cape Canaveral launch pad.