KENNER, La. - A push pin and label show the location of Chad Murray, a chief electrician with Transocean, at the time of the Deepwater Horizon mobile offshore drilling unit (MODU) explosion, April 20, 2010. Murray placed the pin on the chart during his testimony at the Deepwater Horizon Joint Investigation, March 27, 2010. U.S. Coast Guard photo by Senior Chief Petty Officer Mike O'Berry.