We are investigating whether any security issue was breached. The technician is cleared for access in that building, but he shouldn't have left that door open. He should have notified someone to secure the area when he left.

We are putting bar codes on all of the high- and low-density electronic media that are classified.

I'm not even sure we could read these disks now, the technology is so old.

The lab has identified a few patches in a zone not heavily forested that was surveyed before and after experiments in the 1940s and 1950s. As a precaution, we've told them (workers) to steer clear of those areas.

There is no risk to recreational users.