World War II veterans are aging, and so are their airplanes.

Keeping the old warbirds flying is a challenge for crews who maintain planes including the B-17 bomber "Aluminum Overcast."

Only a handful of World War II airplanes still fly, and volunteers such as Terry Tucker and Meredith Whitlock keep them going.

The two retirees were busy when the 69-year-old Aluminum Overcast had engine problems during a stop in Montgomery, Alabama.

The plane attempted to take off on a flight for World War II veterans, but it couldn't because of an oil pressure problem.

Tucker and Whitlock worked long hours to fix it, and the next day veterans got a chance to fly in the plane.

The Experimental Aircraft Association has a warehouse full of parts to fix the B-17.