Astronaut <a href="https://en.wikipedia.org/wiki/Jerry_L._Ross" class="extiw" title="en:Jerry L. Ross">Jerry L. Ross</a>, left, and Astronaut candidate <a href="https://en.wikipedia.org/wiki/Mark_C._Lee" class="extiw" title="en:Mark C. Lee">Mark C. Lee</a> rehearse the deployment of two specially designed flyswatter like tools on the end of the orbiter's remote manipulator system (RMS) arm. This dry run was held in the Weightless Environment Training Facility (WETF) (30877-8); A diver lends Ross and Lee a hand and a tape to measure the process of attaching the tools to the RMS arm (30879).
NASA
Taken on 16 April 1985
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