Terror Attack Defeats Livermore Lab Security

Mock terrorists defeated security personnel in a recent drill at Lawrence Livermore National Laboratory, where nuclear weapons research is conducted, federal officials said Tuesday.

A critical piece of the lab's defense failed during the test when a truck-mounted Gatling gun, capable of firing more than 50 rounds a second, got stuck before it could be deployed. The cause was a faulty hydraulic mechanism that has since been corrected, according to a federal energy official familiar with the security assessment.