WASHINGTON — Days after the Lincoln Memorial Reflecting Pool was refilled with water, a large green algae bloom appeared. Now crews are using chemicals and nanobubble ozone technology to clean the ...

Follow WTOP’s team coverage of the D.C. primary and Election 2026 online, on air at 103.5 FM or on the WTOP News app. For the first time, voters in D.C. will used ranked choice voting when they fill ...

How brushless DC motors use electronic commutation to maximize efficiency and ensure smooth and stable motion. Compare trapezoidal, sinusoidal, and sensorless commutation techniques, including key ...

The importance of motor trajectory profiles and how they’re used in brushless DC (BLDC) motor control to minimize vibration and smooth out other performance issues. Why the PID loop is the most widely ...

D.C. is doubling down on efforts to kill rats in some of its most infested neighborhoods by returning to a method the city has tried before: birth control. The approach, this time combined with an ...

WASHINGTON (7News) — It's that time of year -- spring cleaning! In the District, leaders are rolling out an aggressive approach to repair roads and sidewalks after the brutal winter storms. They're ...

If you spend any time in D.C., you know rats are a problem. "They be in the dumpsters. They be running in groups, like, two, three — a few too many," one man told News4. Another resident said said ...

A former Washington DC air traffic controller on duty the night of the fatal January 2025 mid-air collision involving an American Airlines plane and a US Army helicopter warned how there were “obvious ...

A ground stop was issued at BWI and other airports in the DC region on Friday, according to the Federal Aviation Administration (FAA). The stop was was a result of a strong smell at the Potomac ...

Cruise control can be a true asset when you're on a road trip or stuck in the car for hours. We're not talking about autopilot or self-driving vehicles, but that handy feature that you can turn on to ...

Bryant Reed joined WJZ as an Anchor/Reporter in December 2025. You can find him behind the desk on weekend evenings and out in your communities during the week. Before calling the Charm City home, ...