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This is WEEKEND EDITION from NPR News. I'm Lynn Neary. Primary races are picking up ahead of the midterm elections this fall. On Tuesday, voters in six states will go to the polls, making it one of the most important primary election days of the year.

Among the races to watch is a Tea Party challenge to Senate Minority Leader Mitch McConnell. To give us a lay of the land is NPR political editor Charlie Mahtesian. Charlie, welcome to the program.


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.