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What you wrote about Atlas V is a bit misleading. It uses an American engine for the upper stage, but the whole issue is about the Russian built RD-180 engines
by cfreeman 12y ago
What you wrote about Atlas V is a bit misleading. It uses an American engine for the upper stage, but the whole issue is about the Russian built RD-180 engines that power the first and largest stage. The other ULA rocket, the Delta IV, does use all American engines but the Delta IV is less capable and sees far less use.