Various sources have reported that the Department of Defense has banned USB Flash Drives from being used in the Pentagon. All drives currently in use at the building are being rounded up and collected and employees are being told they may not receive the drives back.

The Pentagon has not issued an official statement but a spokesman said they are taking precautionary measures against a "global virus" that affects external storage devices. The spokesman did not offer any information as to how long the ban would last. More on this as it develops.

Here’s a strange one: the Pentagon reportedly once considered the idea of non-lethal "laughing bullets," which would apparently collapse and release laughing gas (or other chemical agents) when they hit their target. They apparently spent $100,000 on this notion but the bullets did not meet with the DoD’s satisfaction and were ultimately shelved.
New Scientist