Atlas V
Atlas V is an expendable launch system and the fifth major version in the Atlas rocket family. It was originally designed by Lockheed Martin, now being operated by United Launch Alliance (ULA), a joint venture between Lockheed and Boeing. Each Atlas V rocket consists of two main stages.
The first stage is powered by a Russian RD-180 engine manufactured by RD Amross and burning kerosene and liquid oxygen. The Centaur upper stage is powered by one or two United States RL10 engine(s) manufactured by Aerojet Rocketdyne and burning liquid hydrogen and liquid oxygen. AJ-60A strap-on solid rocket boosters (SRBs) have been used in some configurations, but are being phased out in favor of GEM-63 SRBs.
Missions: 101
Successes: 100
Partial Failures: 1
Failures: 0
Success Streak: 91
Success Rate: 99.5%