Gun prompts review at Argonne

Argonne National Laboratory is reviewing its security proceduresafter an employee was able to bring a gun inside its facility lastweek for the first time in the lab's 60-year history.

The Department of Energy worker died of a gunshot wound to thehead April 21, according to the Cook County medical examiner, whichruled the death a suicide.

The 39-year-old employee, who had worked at Argonne for only amonth, was in his cubicle at the time, said Brian Quirke, aDepartment of Energy spokesman. The gun was a 9mm, Quirke said.Although there were two other workers in the area, no one else washurt in the 5:30 a.m. incident.

Still, the breach raised concerns about …