According to the family legend, two brothers, one named Billy and the other Melvin, were standing on the family’s dairy farm one day when they saw an airplane doing some skywriting. The boys watched as the plane sketched out the letters “GP” overhead.

Both brothers decided that what they saw had meaning for them. One thought it meant “Go preach.” The other read it as “Go plow.” Later, one of the boys, Billy Graham, dedicated himself to preaching the gospel, becoming an icon of evangelism. His brother Melvin went on to faithfully run the family dairy farm for many years.

Skywriting signs…