GREENEVILLE, Tenn. (AP) — In 1931, Herbert Hoover occupied the White House.

Winston Churchill was in the midst of political exile in Britain, and in Germany, Adolf Hitler did not yet hold office.

In Greene County, meanwhile, Ray Seaton began working on his father's dairy farm in Debusk.

Seaton, who's quick to tell you he's 93 — even though he doesn't turn 93 until August — still sits in on the twice-a-day milkings of the 50 cows on his family farm.

It's not his weathered and bent hands doing the milking, though. That task goes to his grandson, Ben, 21.

Much about the world has changed since 19...