Anchored to the end of the orbiter's sensor boom, STS-120 mission specialist Scott Parazynski assesses his repair work as the solar array is fully deployed during the mission's fourth spacewalk while Space Shuttle Discovery was docked with the International Space Station.

During the unscheduled 7h 19min spacewalk, Parazynski cut a snagged wire and installed homemade stabilisers to strengthen the damaged solar array's structure and stability in the vicinity of the damage.