Cassidy, Behnken End Productive NASA Spacewalk Saga

NASA astronauts Chris Cassidy and Bob Behnken conduct a spacewalk outside the International Space Station on July 21.
Credit: NASA
HOUSTON—NASA astronauts Chris Cassidy and Bob Behnken teamed July 21 for their fourth and final planned spacewalk outside the International Space Station (ISS) over the past month. This time, it was to prepare the ISS for the arrival of a future commercial airlock, install an external robotic tool...
Mark Carreau

Mark is based in Houston, where he has written on aerospace for more than 25 years. While at the Houston Chronicle, he was recognized by the Rotary National Award for Space Achievement Foundation in 2006 for his professional contributions to the public understanding of America's space program through news reporting.

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