Criticism of the Space Shuttle program (approximately $ per pound adjusting for inflation to 2011). It failed in the goal of achieving reliable access to space, partly due to multi-year interruptions in launches following Shuttle failures. NASA budget pressures caused by the chronically high NASA Space Shuttle program costs have eliminated NASA manned space flight beyond low earth orbit since Apollo, and severely curtailed use of unmanned probes. NASA's promotion of and reliance on the Shuttle slowed domestic commercial expendable launch vehicle (ELV) programs until after the 1986 "Challenger" disaster. "Space Transportation System" (NASA's formal name for the overall Shuttle program) was created to transport crewmembers
Space Shuttle cost around $450 million. Roger A. Pielke, Jr. has estimated that the Space Shuttle program cost about US$170 billion (2008 dollars) through early 2008; the average cost per flight was about US$1.5 billion. Two missions were paid for by Germany, Spacelab D1 and D2 (D for "Deutschland") with a payload control center in Oberpfaffenhofen. D1 was the first time that control of a manned STS mission payload was not in U.S. hands. At times, the orbiter itself was referred to as the Space Shuttle. This was not technically correct as the "Space Shuttle" was the combination of the orbiter, the