Being able to keep material at your desk was wonderful, and so were the materials.

Energy Department officials have said they hope to keep material at the plant for five to 10 years, but may look at other options.

She keeps such material that holds emotional significance for later use in her work.

The administration will also "expand international efforts to keep dangerous biological material out of the hands of terrorists," the action plan states.

Keeping such material will allow scientists to apply what they learn in coming years to old samples.

Bring the main points to the fore, keeping subordinate material in its place.

Offenders are usually fined rather than jailed, and the law does not cover those who keep such material for their private use.

Investments in keeping such people and material out of harm's way, he said, "may increase the probability of getting through the next 50 years."

"It is a matter of policy to keep as little sensitive material here as possible."

He kept much important material at his home, and controlled access to it carefully.