A History of Nuclear Threats, Faults, and Fears Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email Observers on the bridge of the USS Mt. McKinley watch a huge cloud mushroom over Bikini atoll in the Marshall Islands, July 1, 1946, following an atomic test blast. ( Jack Rice / AP Photo ) Produced by Rebecca Clark-Callender Hosted by Brooke Gladstone Produced by WNYC Studios