Navy Petty Officer 2nd Class Ben McCallum hands a Broco cutting rod to Navy Petty Officer 2nd Class Chris Carlson during underwater cutting operations on Big Blue mooring system in Apra Harbor, Guam, Dec. 11, 2017. McCallum is a construction mechanic assigned to Underwater Construction Team 2. Carlson is a diver assigned to USS Emory S. Land. Navy photo by Petty Officer 1st Class Arthurgwain L. Marquez