A controlled burn occurring at Marine Corps Base Quantico Sunday afternoon near the Stafford and Fauquier county line is causing moderate to heavy smoke conditions in Prince William County and other areas of Northern Virginia, Maryland and D.C. The U.S. Forest Service is conducting the controlled burn of about 2,000 acres in the area. Individuals with respiratory illnesses or medical conditions that are aggravated by smoke should remain indoors until smoke conditions clear, according to the Prince William County Police Department. The controlled burn is expected to last two days. The controlled burn appears to have caught local jurisdictions off...