In the cold, grey light of a Washington winter, the heart of the American capital has become the unlikely front line in a terrifying new security crisis. For months, intelligence sources have been quietly sounding the alarm, but a bloody ambush just streets from the White House has turned whispered warnings into a national emergency.
Intelligence officials are now warning of a 'shadow army' of radicalised individuals living within the United States, remnants of the chaotic 2021 withdrawal from Afghanistan, who may be waiting for the signal to strike.
