Being alone at the bottom of the ocean with little to no visibility sounds like a nightmare for most people. For David Callahan, it's his happy place. Callahan, 30, is a commercial diver working on ...

Three fishermen cruise past the mouth of the Mississippi River. Alice in Chains blares from an overhead speaker, blending with the slap of waves against the boat's hull. Offshore oil platforms grow ...

Oil rigs, particularly the offshore type, are one of the most fascinating parts of the global energy industry. How do they work? How big can they get? Do they float on water? It's not surprising that ...

David Callahan is one of a few hundred people who are deep-sea oil rig divers, and he can’t imagine doing anything else Meredith Wilshere is a Society and Culture writer at PEOPLE. Her work has ...