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On Friday, Jan. 17, President Barack Obama will give a major speech announcing the results of the administration's review of US electronic intelligence gathering. The president will speak at 11 a.m. from the Department of Justice. The White House says the president will address the balance between national security, foreign policy and civil liberties, as well as maintaining public trust.

NPR is providing live coverage of the event, with analysis, from 11 a.m. until 1 p.m. You can listen to the coverage, when it begins, using the NPR module below.

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.