C-130 Hercules airplanes fly people and supplies all around the world supporting the military.

When they come home, workers at Robins Air Force Base repair each part including the four propellers onboard.

13WMAZ went Behind the Lines and into the vital mission of the prop shop.

About 100 people grind metal in Robins prop shop, but it's the only place in the entire Department of Defense this work happens.

"It's loud. It's very loud," Tracey Owens, a mechanic, said.

Owens and the other prop mechanics pump out about 30 props each month.

"We are an overhaul facility," Kyle Barrett, another prop mechanic, said. "We take it down to the bare metal."

"The props come in dirty and damaged," Barrett said. "These have probably been in Afghanistan, you know, the elements out there. Nothing but sandstorms."

The Museum of Aviation in Warner Robins will soon have a new leader. President and Chief Operating Officer Patrick Bartness says he's retiring at the end of the year and Chrissy Miner is replacing him.

The Museum of Aviation is famous for flight, but what about driving?

Wednesday morning, the museum welcomed in two veteran vehicles to their collection.

The Cougar MRAP is designed to protect its occupants from explosions.

The one in the museum was used by Air Force personnel and was hit by an IED in January 2014.