Steven Nerheim, the Coast Guard director of Vessel Traffic Service Houston, provides testimony during a hearing in Galveston, Texas, Thursday, June 5, 2014, for the investigation into the collision between the Miss Susan and Summer Wind on the Houston Ship Channel. The collision resulted in an approximately 168,000 gallon fuel oil spill March 22, 2014. U.S. Coast Guard photo by Petty Officer 1st Class Andrew Kendrick.