Maryland September 12, 2024 10:19 am Some DC-area schools on alert after social media threats None of the threats have been deemed credible. News4’s Joseph Olmo reports. Local 2:24 Katie Ledecky shares swimming journey to kids, talks about life after Olympics 2:07 Why does the sky look bluer in the fall? 1:37 Memorial held for DC woman year after disappearance 25:47 Israel attacks Iran: The News4 Rundown 1:49 George Washington's Mount Vernon undergoing renovations to preserve mansion