NPR News

President-elect Donald Trump speaks to supporters during a rally in Fayetteville, N.C., Tuesday, Dec. 6, 2016.
Gerry Broome / ASSOCIATED PRESS

President-elect Donald Trump is touring battleground states that delivered him victory on Election Day. Last Thursday, he spoke in Cincinnati, Ohio, and has stops scheduled in Iowa and Michigan. On Tuesday night, Trump spoke in Fayetteville, N.C.

In 1957, Joel Healy witnessed one of the largest nuclear tests ever conducted on U.S. soil.

Healy was in the U.S. Army, stationed in the Nevada desert north of Las Vegas at Camp Desert Rock. He was 17 years old and a private first class at the time.

Healy drove dump trucks, moved materials, and built structures, like houses, that would be destroyed by the explosions so the Army could study the effects of a nuclear blast. He also helped build the towers where many of the bombs were detonated.