<p>The 59,500 metric ton semisubmersible Thunder Horse platform in August began its 60-day journey from South Korea, around Africa en route to Corpus Christi, Texas. In 2005 it will be moved to the Thunder Horse Field about 190 kilometers south of New Orleans. Both the platform and the transport vessel are the largest of their kind ever built — appropriate, because the Thunder Horse discovery is the big reason why the deep water play now dominates Gulf activity.<em>Photo by Marc Morrison,courtesy of BP America.</em></p>