The first person to die in the construction of the Hoover Dam was J.G. Tierney, a surveyor who drowned in the Colorado River on Dec. 20, 1922. Thirteen years later, to the day, his son Patrick became the last man to die when he fell from one of the intake towers.

The first conscript in World War II was the son of the first conscript in World War I. Alden C. Flagg Jr., of Boston, held the first number drawn in the U.S. peacetime draft lottery of 1940. His father, Alden C. Flagg, had drawn the first number in the draft of 1917.