Troops don't always benefit from 'virtual reality' training.

• Position: WASHINGTON PULSE: NEWS FROM INSIDE THE BELTWAY

* Virtual reality is not always the best choice for military training, according to a recent government study. "VR simulators are usually located in comfortable environments, with air conditioning to cool computer equipment, so the operators never get tired from running with a large backpack, or wet and cold, or otherwise physically stressed as they would in a real-world training exercise," says Clay Wilson, an analyst at the Congressional Research Service. But...