Dirty bomb material secured at site in Philadelphia, thousands of sites remain in U.S.
Photo: (NNSA) Raw, radiological material that terrorists could use to build a dirty bomb was secured in a Philadelphia school this week. On March 11, the U.S. National Nuclear Security Administration (a semiautonomous branch of the Energy Department) and Philadelphia’s Temple University announced they had secured a device containing cesium 137 — one of more than two dozen such elements… Read more →







