NASA Managers decided overnight to shorten the fourth EVA by two hours as a precaution due to Hurricane Dean's continued path into the Gulf of Mexico. The EVA duration was five hours and 2 minutes, with a total EVA time of 23 hours and 15 minutes for the mission. The EVA accomplished three primary objectives, and one get-ahead task. Two tasks were deferred: plans to tie down debris shields on the Destiny lab, and relocation of a tool box. During the spacewalk, Williams and Anderson got a good look at Hurricane Dean, and were both awed at the sight. "Holy smoke" was Anderon's initial comment. "Man, that's impressive", Williams replied. Anderson added "They're only impressive when they're not coming towards you." Transfer activities were completed ahead of schedule, and both crews worked hard to get everything transferred back to "Endeavour" after the spacewalk.