Wright-Patterson Air Force Base went into lockdown for several hours while security officials investigated reports of a shooter on the campus but eventually gave the all-clear. Two individuals reported hearing one gunshot at the base just east of Dayton. Over the next four hours, officials from the 88th Airbase Wing said responders conducted two sweeps of the National Air and Space Intelligence Center, a three-story, 850,000-square-foot headquarters for the center described as the Department of Defense’s primary source for foreign air and space threat analysis. No threat was identified and no injuries were reported. A major investigation by federal officials is on at this hour.