Snakeheads were illegally dumped into a pond in Crofton, Maryland two years earlier. They spread into the Potomac River drainage, eventually making their way into Virginia streams. They finally ...

(Read more: Fishermen battle invasive ‘frankenfish’ snakeheads.) The largest U.S. invasive population lives in the Potomac River drainage of the Chesapeake Bay watershed. In 2002, a snakehead ...

A National Oceanic and Atmospheric Administration plane used a green laser Saturday to search the Potomac River for helicopter parts amid the investigation into the Jan. 29 collision. The NOAA ...