Editing Apollo program (section)

===Uncrewed flight tests===
<imagemap>
File:Apollo unmanned launches.png|thumb|right|upright=1.15|Apollo uncrewed development mission launches. Click on a launch image to read the main article about each mission.|alt=Composite image of uncrewed development Apollo mission launches in chronological sequence.
rect 0 0 91 494 [[AS-201|AS-201 first uncrewed CSM test]]
rect 92 0 181 494 [[AS-203|AS-203 S-IVB stage development test]]
rect 182 0 270 494 [[AS-202|AS-202 second uncrewed CSM test]]
rect 271 0 340 494 [[Apollo 4|Apollo 4 first uncrewed Saturn V test]]
rect 341 0 434 494 [[Apollo 5|Apollo 5 uncrewed LM test]]
rect 435 0 494 494 [[Apollo 6|Apollo 6 second uncrewed Saturn V test]]
</imagemap>
[[File:The Journeys of Apollo.webm|thumb|''The Journeys of Apollo'', a NASA documentary about the Apollo program]]
{{Main list|List of Apollo missions}}

Two Block I CSMs were launched from LC-34 on suborbital flights in 1966 with the Saturn IB. The first, [[AS-201]] launched on February 26, reached an altitude of {{convert|265.7|nmi|km}} and splashed down {{convert|4577|nmi|km}} downrange in the [[Atlantic Ocean]].<ref>{{cite book|url=https://www.scribd.com/doc/59688171/Post-Launch-Report-for-Mission-as-201-Apollo-Spacecraft-009|title=Postlaunch Report for Mission AS-201 (Apollo Spacecraft 009)|date=May 6, 1966|publisher=NASA|location=Houston, TX|format=PDF|id=MSC-A-R-66-4|access-date=August 1, 2013}}<!----Original URL for document on NTRS server: https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19750065090_1975065090.pdf----></ref> The second, [[AS-202]] on August 25, reached {{convert|617.1|nmi|km}} altitude and was recovered {{convert|13900|nmi|km}} downrange in the Pacific Ocean. These flights validated the service module engine and the command module heat shield.<ref>{{cite book|url=https://www.scribd.com/doc/59690251/Post-Launch-Report-for-Mission-AS-202|title=Postlaunch Report for Mission AS-202 (Apollo Spacecraft 011)|date=October 12, 1966|publisher=NASA|location=Houston, TX|format=PDF|id=MSC-A-R-66-5|access-date=August 1, 2013}}<!----Original URL for document on NTRS server: https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19740075039_1974075039.pdf----></ref>

A third Saturn IB test, [[AS-203]] launched from pad 37, went into orbit to support design of the S-IVB upper stage restart capability needed for the Saturn V. It carried a nose cone instead of the Apollo spacecraft, and its payload was the unburned liquid hydrogen fuel, the behavior of which engineers measured with temperature and pressure sensors, and a TV camera. This flight occurred on July 5, before AS-202, which was delayed because of problems getting the Apollo spacecraft ready for flight.<ref name=NASAreport>{{cite tech report |author=Chrysler Corp. |title= Evaluation of AS-203 Low Gravity Orbital Experiment |date=January 13, 1967 |publisher=NASA}}</ref>