The following statement was released from U.S. Chemical Safety Board Chairman Dr. On the one-year anniversary of the Deepwater Horizon oil rig accident I would like to take this opportunity to remember the 11 workers who were killed as a result of this catastrophic explosion and fire. We also wish to express our condolences to the families and coworkers whose lives will be forever impacted. The CSB’s investigation of this accident continues to examine a number of critical offshore oil and gas process safety issues. Currently CSB investigators are focusing on evaluating physical evidence, including participating in the first phase of the blowout preventer testing.