The natural gas industry has changed the career path for Cory May, 23, standing next to pump jacks at a storage facility in Zanesville, Ohio. After completing an 80-hour shale exploration certification course, the Marine combat veteran got a job cementing wells for Halliburton that will pay $60,000 to $70,000 a year. (Associated Press)

The natural gas industry has changed the career path for Cory May, 23, standing next to pump jacks at a storage facility in Zanesville, Ohio. After completing an 80-hour shale exploration certification course, the Marine combat veteran got a job cementing wells for Halliburton that will pay $60,000 to $70,000 a year. (Associated Press)