An executive at ScienceLogic, a company used to monitor the online networks of the FBI and the Department of Defense, among others, were missing Monday after a four-alarm fire destroyed his 16,000-square-foot Annapolis home. Don Pyle, the chief operating officer at the Reston-based technology provider, and his wife Sandy, couldn’t be located, authorities said Monday. It took 85 firefighters nearly three-and-a-half hours to get the blaze under control and firefighters had yet to set foot inside the building, uncertain about its integrity, Monday afternoon. Neighbors told The Washington Times the Pyles’ grandchildren may have been staying with them for the...