Capt. Brian Penoyer, the commander of Sector Houston-Galveston, shakes hands with Cmdr. Gregory Callaghan after command of Marine Safety Unit Texas City was transferred to him during a change-of-command ceremony at the Charles T. Doyle Convention Center in Texas City, Texas, Friday, June 3, 2016. Prior to taking command of the MSU, Callaghan was the executive officer under Cmdr. Ricardo Alonso. U.S. Coast Guard photo by Petty Officer 1st Class Andrew Kendrick.