Correction appended April 8, 2010
Andrew Bieniawski was in bed when the earthquake struck. On Feb. 26, Bieniawski, the assistant deputy administrator for the U.S. National Nuclear Security Administration (NNSA), had arrived in Santiago, Chile, to join a group of scientists and nuclear engineers on a top-secret mission to remove a potential nuclear bomb from the country. Around 40 lb. (18 kg) of highly enriched uranium (HEU) with enough latent energy to destroy a portion of a city had already been inventoried, secured and made ready for transport to a highly secure facility in the U.S. Running ahead...