NORAD said at about 7:50 a.m. local time on Sept. 19 (19:50 Beijing time) a
general aviation aircraft entered a temporary flight restriction near Thurmont,
Maryland, while President Trump was at Camp David. NORAD dispatched F-16s to
intercept and released flares to alert the pilot; the aircraft left the
restricted area under fighter escort. NORAD said the flares burned out quickly
and posed no danger to people on the ground.