Local, state and federal agencies are holding an oil spill response exercise at the Port of Houston, April 25-26. The exercise scenario simulates an explosion, fire onboard the ship Cape Trinity, and a 252,000 gallon oil spill in the turning basin of the Houston Ship Channel. The Cape Trinity is a Maritime Administration (MARAD) ship used for transporting military equipment and supplies overseas. The exercise, called Trinity 2006, will be used to train and test local responders and response plans. Agencies participating in the exercise include: U.S. Coast Guard, Federal Bureau of Investigation, Texas General Land Office, the National Oceanographic and Atmospheric Administration…