Payload
STS-135 delivered supplies and equipment to provision the space station through 2012, following the end of NASA's space shuttle program. Since the ISS program is likely to be extended to 2020, the station will likely require more spare supplies after the shuttle retires. A shuttle extension beyond STS-135 would have allowed the crew to maintain the completed U.S. orbital segment, relying on the shuttle, but an ISS extension was never intended to be a guaranteed shuttle program extension, and the shuttle program officially ended after STS-135.
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STS-135: MPLM rack complement.
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STS-135: LMC RRM up and ETCS/PM down payload.
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Graphic representation of the RRM on ELC-4 with the SPDM on the right.
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Pico-Sat Solar Cell (PSSC-2) experimental picosatellite breakdown.
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