The United Launch Alliance Atlas 5 rocket, standing 194 feet tall and and weighing a million pounds, unleashes 1.6 million pounds of thrust from its main engine and two side-mounted solid boosters to launch the secret NROL-52 payload for the U.S. National Reconnaissance Office from Cape Canaveral.

With the performance hit on the Atlas 5 rocket’s most recent flight last month now isolated to a faulty valve, preparations to resume the manifest are underway as United Launch Alliance workers stack the next booster for blastoff this summer.

After a brief delay to chase away a boat from offshore waters, Japan’s H-2A rocket launched at 0650 GMT (1:50 a.m. EST) with the Telstar 12 Vantage telecom satellite. The launch from marks the first flight of an H-2A rocket with an upgraded upper stage, and the launcher’s first dedicated commercial mission.