1. Ground stop impacted airports, including BWI-Marshall | Here’s why  WBAL-TV
2. U.S. FAA lifts ground stop at the three Washington-area airports  The Detroit News
3. Odor from overheated circuit board forces ground stops at BWI, other DC area airports  WBFF
4. Passengers face hours-long delays across DC-area airports after equipment malfunction at air traffic control center  CNN
5. Ground stop lifted at all DC-area airports  WUSA9

Source: Google Finance – Market News