Space shuttle STS-127 flight day 10

The fourth spacewalk for the STS-127 Mission was completed today at 5:06 pm EDT after seven hours and 12 minutes. Chris Cassidy and Tom Marshburn finished replacing old batteries on the Port 6 truss of the station. This task had been started on the third spacewalk of the mission, but was not finished due to a CO2 issue with Cassidy's spacesuit. There was no immediate danger, but ground control decided to end the walk prematurely just as a precaution. More

(Source: Examiner.com - Jul 25)