STS-120
mission
specialist
Scott
Parazynski
participated
in the
second of
five
scheduled
spacewalks
as
construction
continues
on the
International
Space
Station.
During the
6-hour,
33-minute
spacewalk
Parazynski
and Daniel
Tani,
Expedition
16 flight
engineer,
worked in
tandem to
upgrade
the space
station.